I know how hard it can be. Do you have enxiety? your descriptopn sounds like it.

Why are you doing this? you have a goal - to get a degree and a profession! and you do this, althought you have fears so only for overcoming that fear and working like any student you deserve to be praised - i know that you forget it and that teachers don`t know it - but you overcome you made that decission to do what you have to - and believe me - this actually means you have the courage, and the ability to work

Also - you know- passing a test is not a life/death issue, its just what it is. if you fail an exam you can always do it again. If things don`t go well it doesn`t mean you are less smart than you thought you were - it means that it takes more work than you thought, and you can do it

Good Luck