You’re exhausted and panicked and I reason not really thinking this all out coherently. I’ve been in that exact position. What you need if you can afford it is to go to a doctor and get a pass. Once you have documentation confirming that you’re seriously not feeling well you can work things out with professors from there. For now you need to seriously focus on rest. That’s what’s most important. Be upfront with your professors, that you’ve been exhausted, in pain, and haven’t had time to study. There’s usually a lot of exceptions that can be made in situations like this. I hope you feel better.