I can't concentrate.
My mind doesn't work, I can't do my homework.
I can't do this.
For the first time, I can't understand anything.
I can't do it.
I'm incapable.
I can't.
I'm struggling with (what used to be) my easiest class.
How is this happening?
I can't do it.
I can't.

a/n: Geometry's a bitch.