My exam panic has just jeopardised my whole future?

After all the health issues i have been throught this year (including type 1 diabetes) and all the social isolation and being told i needed a face operation of the NHS, and realising i was homosexual (which i cant admit, even to myself) and suffering an ongoing speech impedement, it was hoped that all this would have been put behind me and i would achieve all A's in my higher exams, to get into my drea proffession medicine. But no, i hae already sat most of my exams and struggled so much for time in the exam, that i am doubtful i have even passed. I just feel so gutted, as that was my only hope to a successful, fulfilled life and now i cant help but see myself anything more than a shopkeeper. I had my whole future in my hand and i just flung it away. All that is running through my mind is a bottle of vodka, as that seems to be my only thing to look forward to , and i am only 16, and only want to go on hoilday to spain with my parents just so i can buy my own alcohol. I just don't see any more hope. Everythings just seems to be going downhill from here. Does anybody else feel the same? please advise me.