Hello Sandra,
I'm really sorry I can't be there with you to help you with the stress from your exams. I am sure you'll do great and pass with flying colours :)
The best way to stop stressing, from experience, is to stop studying for a couple of hours (or the rest of the evening), try not to think about the exams, run yourself a nice hot bath and relax..... What you can also do is eat chocolate ice-cream; I have no idea how, but it helps a lot. Maybe you should listen to some relaxing music?
I really hope you do well in your exams, as I'm sure you will, and write to me to let me know how it went :) I'm waiting for the good knews :)
Love from [напишешь тут своё имя на английском]