Dear
Welcome to HCM
We understand your concerns
I went through your details. I suggest you not to worry much. I can understand the condition you are in. I sincerely suggest that you do not have any mental troubles. You are just disappointed with life. I know what disappointment is. But, if god closes a door in front of you, he also opens ten other doors. But, if you stand in front of that closed door, you may not be able to see the other open doors. You need to get away from that closed door and see wide.
You are worried that you are worthless. How can a person, who is qualified so much, can say she is worthless? You should change your attitude towards life. That is all the treatment you wants. Think positively. There are lot of people like you, or far more troubled than you. In fact 80% people far more troubled than you, in one way or other. Understanding life should clear your problem. Believe me.
If you require more of my help in this aspect, Please post a direct question to me in this website. Make sure that you include every minute details possible. I shall prescribe the needed
psychotherapy techniques which should help you cure your condition further.
Hope this answers your query. Available for further clarifications.
Good luck.