Do you have any safety medication, like Ativan? Exams are super stressful, but they do end.
I used to have a crazy belief that got me through college and grad school. Someone taught me you just need 1 4 hour REM cycle( probably not true). I would go to bed at some crazy time like 5pm sleep until 9 pm, and then get up and study right up to exam time with tons of coffee. 4 hours sleep - rinse repeat for next exam/paper. It was eccentric but I got very good grades lol. This is the time when all that container. lock box thinking would come in handy, so you could picture your emotional stuff with T locked in Tupperware and placed on a shelf until after exams. Compartmentalized for just a few days. . .