its just 5 more months i know you are very stressed right now but try and relax, calm down and believe in yourself. You can do this. if you have put up with it for a little under 2 years, then you can put up with it for 5 more months. it will go by really quick, there is still time for you to make an academic comeback, get back on your feet and try again. Even if you fail your a levels atleast you did all you could. Regret is the worst feeling in life. Even if you don't want to go to university, wouldn't you like feeling that you have the option to even if you truly don't want to, wouldn't it still be an accomplishment of some sort to finish 6th form and also make you further qualified for future jobs. YOU CAN DO THIS. DON'T GIVE UP NOW. YOU GOT THIS.