I just quit my studies, i have so much anxiety, loneliness, and feel like crying all the time?

I just quit my studies, and when ever i think about studying or my future i panic and my head hurts, so i start thinking about other random things, or just get on the net to watch funny you tube crap, or just masturbate so i can fall asleep and not think about life. I'm a 24yrs old women, and i feel like my life is so pointless and that I've achieved nothing. I had many good jobs in the past, and because i had such a **** childhood i always use to get drunk and fuc$$ my job up, or just quit because i had no money to get to work, because i had spend all my wages on partying. This year i thought that i would change my life, and start studying, but because of the stress of exams and major projects i felt so anxious that i couldn't actually do any of them,i panicked and gave up. I know its sounds so stupid. I always found myself as a people person and like helping others, but now when i'm at a low point in life, i feel i can't talk to anyone about it. I always considered myself as being independent, but when things don't work out right i tend to just pack up and move. I have moved 8 times since i turned 21 and haven't really felt like i belonged anywhere. My family are not that supportive either. My mum is a hypocritical islander who lives by her rules, thats its there way or the high way. At this time i do feel so helpless that i have no career path or ambition in life, because i know that i will just fail again. I don't know what i want in life anymore. I know i desperately crave to hug or hold a men, and for it to mean more than just , but in my life its so hard to find that. So with no career motivation, or close friends, i just stay locked in my room all day. When my room mates get home i dress up and pretend i was out all day, or at school, because i haven't told anyone that i have quit yet. I really don't know how anyone can help me, but if anyone has any advice please it would be very much appreciated.