Princess Aurora

The next morning, Twilight woke up first. She smiled at the Pegasus next to her and figured she was still asleep. She nudged her in the side with her muzzle, trying to gently wake her up.
Dash slowly opened her eyes, but before she could turn her head to look at the alicorn she was met by nausea and dashed into the bathroom, which was right next to her bed.
Twilight blinked in surprise and went towards the bathroom door, only to see, and hear, Dash saying goodbye to the contents of her stomach.

"Rainbow? Are you okey? Are you sick? Oh my gosh I'll go get help!"

Before Twilight could move, Dash spoke up.
"Twilight..."

The alicorn rushed to her side. She put a hoof on the Pegasus' shoulder, trying to comfort her.
"I'm fine. This is..normal.."

Now Twilights thoughts ran in a chaos. Maybe this magic really Is dangerous. For Rainbow.
The door unlocked and a guard stepped in.

"Princesses?"

"We're in the bathroom!"
Twilight answered.

"Breakfast is ready. Princess Celestia is waiting in the dining hall for you two."

"We'll be there in a minute."

"Very well."
The door closed. Twilight got up and helped Dash to her hooves. They went out of the bathroom.

"Maybe you should stay up here. I could bring you something if you want."

"No. I need to be there. You heard him, mum is waiting for us."
Twilight just glanced at her.

"It's never a good thing if she's waiting. Trust me."
The two walked out of Dash's room and into the dining hall. Dash fought the urge to throw up again from the fear of what Celestia would want to talk with her or Twilight, or both.
They got on seats at the table. Dash glanced over the table, that was covered in breads, toasts, pancakes and lots of other stuff. She could practically feel it coming back up, even before she ate anything. Twilight looked at her concerned, but tried to hide it so Celestia wouldn't get a hint.

"Good morning Aurora. Good morning Twilight. I hope you two had a pleasant night."

'Yeah. Stop covering up that something's going on and just tell us already!'

"What did you want to tell us."
Twilight almost glared at Dash.

"Why don't we eat first, my dear."

"I'm not hungry."

"Not even a bit? You must be half starved after what happened a few minutes ago."

"How do you-"

"Your room has guards for a reason."
Dash shrunk into her seat. Twilight got worried. Celestia probably knew about everything they did and talked about from yesterday. Maybe Dash was in trouble thanks to her! The last thing she would want is to make things more uncomfortable for Dash...

At that, Dash began twitching again. She shut her eyes and ran out of the room into the nearest bathroom to throw up again, leaving a stunned Twilight with Celestia in the room. Celestia closed her eyes and shook her head.
Dash was in trouble. Twilight just knew it.
She went after her again. Dash sat there twitching and shivering, her hooves clutching her stomach.

"Rainbow? ...is..everything alright?"

"Go away.."

"Rainbow..I'm sorry. I didn't mean to-"

"Go!"
Dash yelled as the shivering and twitching overtook her.
Twilight was taken aback, but complied and went back into the dining room.

"Maybe I should have told you sooner, but she really hates it to show any kind of weakness to Anypony."

"I never would have guessed."
The alicorn said sarcastically as she got back onto her seat. Celestia stood up.

"If you don't mind, I need to talk to my daughter in private."
Twilight nodded and Celestia went into the bathroom and went out with Dash into Rainbow's room. Once they were in, the door slammed shut, causing Twilight to jump slightly and get more worried. The guards in front of the door even had spears, more than ready to attack every pony that came near the room. She gulped. All she could do now was praying. Praying that Dash would be okey...
In Rainbow's room, the Pegasus sat on her bed with her head hanging low.

"You need to learn to control your magic! Before you can do that, you are NOT leaving this room! Do. You. Un.der.stand.?!"

Dash just kept looking down. Finally she nodded.

"And I am not going to let you leave again. Even if the danger is over. You are staying here at the castle."

Dash fought back tears. She wouldn't see her friends ever again! She would never fly again! The Wonderbolts...
...would stay a dream
Her friends...
...would be worried sick and she would miss them so much
All she had now was Twilight, her strikt mother and the magic barrier to block her magic...
Celestia left her alone, slamming the door shut again.
This couldn't be happening...
A few minutes later, Twilight finally came into the room. Only to find Dash frozen on her bed, eyes glued on the floor and...crying?
The first tears were falling down.

"...Rainbow?"

Dash shut her eyes, jumped off the bed into the bathroom and locked herself in. Twilight walked over to the door and tried to open it with her magic, being reminded of the blocking spell.
She wanted to knock but froze when she heard the cries and sobs from her friend. All she wanted to do was being by her side right now, but the door wouldn't open.

"Rainbow? Are you okey?"

"NOOO!!!!"

She jumped by the scream.

"Rainbow...please open the door..."

"NOOOOOOO!!!!!!!!"

Her crying grew louder. Twilight wanted to know what happened. The door to Dash's room unlocked and the two guards came in, unlocked the bathroom door with their magic while they broke the barrier for a second and grabbed Dash by her arms. Twilight couldn't bear the sight of her friend. She had never seen Rainbow so down since the Tank hibernating incident a few months ago.
Dash got carried out of the room by the guards, leaving the once again stunned Twilight alone in the room. The Pegasus just kept screaming and crying. She was taken to the medical centre of the castle, where she got a sedation. A few minutes later the castle was silent again.