Hello my dear friend
I hope that everything turns out all right. im sorry to hear that you felling stressed about your exams.I think i can help. Here are a few things you could try. First idea, dont worry too much, if you worry a lot, you can get headache. The secound idea is to go walk in the park every morning, fresh air can help you to calm. i hope my advice help you. Talk to you soon.
your dear friend (твоё имя)