Yo zarrah--wutup. Relax a bit. I think Micro/Immuno was one subject I learned really well and surprisingly still remember it. First of all I used Lange's Micro And Immuno book--I thought that was a great text. I mean it's a lot more detailed than CMMRS (however you abbrev that, I haven't used that book). But it's not too bad--like there are 2-3 pages on each bug and tells u everything. So, what I would do is use my class notes, study/read those, read the 2-3 pages on the bug, write down all the relevant stuff abt the bug that wasn't in my notes, ON the notes. And I just used my notes as a primary reference. I would also did some cases (clinical vignettes) that we had in class to reinforce the learning. You have to LEARN classic presentations--instructors love to use those (E.g kid touches rose thorn bush: sporothrix shenkii--ask yourself what do u treat this c? Milk and Pottas Iodide) You know?
I had friends who purchased those BUG cards. I am not sure who makes them. But they semmed kinda' cool in the sense that everything was there (pathogenesis, treatment, characteristics, etc.). I have never really been a flash card type just cuz it takes too much time to make then and too much money to buy them--lol. But i think other people can comment on how useful they were. So what I would recommend you would to be MAKE one source (including your notes) and before us tart studying each day--go over the previous stuff--it will reinforce things a lot quicker. And everytime u run into a similar disease caused by another bug (Cellulitis caused by both Staph aureus, and S.pyogenes, rite? I'm pretty sure, lol), make a seperate note of that, and what drug would u use empirically that would cover both.
Best of luck! Learn it well, you'll be surprised how much u remember later on. I took it last august, and surprisingly I rem a lot of it. Don't let those micro-org's take that honors or "A" away from ya

Show 'em whose daddy!