boy that sounds like a lot! I have taken both microbiology and biochemistry so i totally feel your pain! However, I have never had the privelage of having all three of those exams in one week (knock on wood)! what i would suggest is make a list of required topics you are supposed to know for your exams instead of having to go through every freakin slide and every page of the book and learning everything and set up a time table as to how many hours you will spend studying for each test and get plenty of sleep! Don't become even more stressed out if you don't get everything done. Stick to your plan as much as possible but remember a lack of sleep and anxiety won't help. It is better to be rested and have done as much as you can, than try and cram it all when your brain and body want to rest! Good luck :)