Can you get a medical certificate? Do some extend it sound like you have put off your learning until the last minute (this could be wrong)? Try and get a medical explanation, and maybe an extension of some sort.

It does sound like you are under TOO MUCH pressure. Can you take some time off? I think if at all possible, that you need to reduce the pressure upon yourself.

Hey I fell out of education at 13, I personally could not endure the sort of stress it sounds like you are under. In my strong opinion learning should not be FORCED within strict time frames, but flexibility is key. I feel like it is not right that you are under such obviously extreme pressure. Many people could not handle it, you are hardly alone