How can I exercise ‘self control'?

Please be patient with me. I am 29. I have a very tragic life so far. I have been into Indian Software Giants for quite a while before my marriage failure turned my life upside down. And now I am a confirmed depressed personality. Presently I am back to studies. I still top my cl in my post-grad. Now coming to my issue, I am bankrupt when it comes to controlling me. I cannot prioritize. Neither can I refrain myself from doing something that exacerbates my despair. I panic alarmingly for no reason at all. I fear stress and I always tend to find an escape route (like Facebook, chatting with my friends, flirting with girls – all that adds up to my despair). No professional medical help has worked so far. I understand that I am not earning anymore so I cannot support my father who is running the family even at the age of 68. All I need is to study for hours at length. I desperately need your expert opinion. My apologies if I sound weird. Thanks in advance.