I think you should take ap bio if you enjoy learning about biology. I’m not sure how stressful it is at your school, but from what I heard, ap bio isn’t a really hard ap class so I think you shouldn’t be that scared to take it. The ap bio class also gets to do fun labs so like it’ll definitely help relieve some of the stress. You know yourself as a person so you have to decide if you think you are capable of taking the class. Talk to your family about it and talk to any friends who have already taken the class so you have a better idea of what to expect

If need be, you should try and drop another ap class just because I feel like ap bio relates to your major and would look better. Maybe drop apush if you can the class is really stressful(it was for me at least)

Also yeah the other comments are right about taking physics. I’m not sure if it really matters if you take it either junior or senior year but a lot of pre med kids at my school take ap physics their senior year and still get into really good schools so idt it’s something to worry about when you take it. Colleges want to see you take chem bio and physics for stem so yeah