Depending on the school and the teacher micro and AP2 can be crazy difficult. If I were you I would do AP2 and chem together and then try to take micro in the summer. If you really wanna finish them all in one semester I'd see if I could take chem online. To me online classes are a little easier and you can do them on your own time so it wouldn't interfere AS MUCH with micro and AP2. Hope this helps! GOOD LUCK!!! p.s. If you didnt get an A in AP1 I wouldn't attempt doing all these in the same semester.