From your thread back in March, I would say that your parents are the very last people to whom you should be listening right now. From what you wrote there, your parents are thinking about the prestige of the college which they want you to attend, not about whether you will reach graduation in one piece.
Are you seeing a therapist right now? If so, ask them. If not, you really should see one.
While I lean towards saying that you should drop AP Lit, you also write that you are enjoying it, and it interests you. Is there another AP class which interests you less that you can drop instead?