I am an 18 year old medical student. I get random anxiety attacks (mild ones) and get them more frequently during exams. I have final exams in a month and preparatory for that in 4 days. The preparatory exam does not matter in any way but the thought of giving an exam without giving my 100% effort freaks me out and makes me very anxious. I have studied (revised) about 60% right now and the rest can be done easily if I study correctly as planned for 5 more days and revise the previous days of the exams. 

But I wasted my time yesterday, and I'm feeling really guilty because if I waste today then I will have to leave something unread for the exam and it is freaking me out. I'm having a brain fog and can't think straight and I'm really afraid I will waste today too. Typing this post itself is making me feel more guilty that I'm just doing this to avoid studying. I've had a very disturbed sleep yesterday (which almost never happens to me) and now I'm feeling very overwhelmed because I just found out that I have to submit journals before 31st too. Please help.