Here is my whole story, bear with me please.
I applied last year to USC as a first year but with a terrible high school record, 3.1 I believe and 1800 SAT. My essay was about how I turned my grades around from the first 2 years to the last 2; obviously didn't work. I only got accepted to csula but I wanted a second chance at USC so I decided on CCC instead.
For fall I attended 2 different CCCs because of crowded classes. I took Freshman composition, Calc 1, Human Geog, International relations, philosophy, and Art History then world history for winter, so total of 23 units done after winter is over. With all that done, I only need a life science, physical science and the WRIT150 equivalent and I'll be done with all of the USC core GEs on the TPG. For spring initially, I am attending 2 CCCs again, I registered for WRIT150 equivalent, Arabic 1, guitar reading at one school and calc 2 and physics for scientists and engineers 1 at another. The school with the calc and physics has already started their spring term but physics is crazy hard and I am already lost. It's only been 2 weeks and I hate it because I don't understand a thing. I had no other exposure to physics in college or high school and jumping straight into engineering physics might've been a mistake. I am waitlisted for Bio however at the other school that hasn't started yet and I want to drop physics and take bio instead. But I am afraid if I do that, it would really hurt my admission since I am applying for engineering at USC.
I already sent in my application last week too so I don't even know how I would go about letting them know of the change, I even sent transcripts already.
My major was aerospace engineering and my second choice was undeclared. How am I looking for both of those. For fall, I took 20 units, and I ended up with a 3.5 GPA. A in English, B in calc and then 2 As and 2 Bs in the rest of the GEs. The transfer center said my essay was really good, I made it on the presidents list but I am still really scared for admission since if I do drop physics, there's basically no sciences.
However, if I do make the switch and do bio, that will mean I will have completed all of the USC GE requirements EXCEPT physical sciences, aka physics.
If USC doesn't work out, I want cal poly Pomona as a backup, so how would doing physics later look to them. I believe they want 3 levels of physics, so if I drop this one I will be a semester late.
This is all stressing me the hell out because it's making me feel like I am just going to end up nowhere or that I should've just stayed at csula and let my dreams just be that; dreams. So I would like your expertise on my issue because as of now, I have absolutely no idea what to do. My parents didn't attend college in the US so they don't know either and there's really no one else to turn to.