Dear Welcome to HCM We understand your concerns I went through your details. I suggest you not to worry much. Self confidence never comes suddenly. Every experience in your life gives you experience. Self confidence level differs at different capacities. I sincerely suggest that you are victim of your own negative thinking. You cannot term your current state of mind as clinical depression. Rather, this is just disappointment. Disappointment which arises out of unforeseen life events do bring such symptoms like sadness, irritation, anger, lethargy, lack of interest, lack of appetite etc. Please understand this fact and make sure to introspect. Talking to your friends, out door activities and being creative should give you relief. Find the reason for your disappointment and consult a psychologist if need be. Psychotherapy techniques should suit your requirement. If you require more of my help in this aspect, Please post a direct question to me in this URL. http://goo.gl/aYW2pR. Make sure that you include every minute details possible. I shall prescribe the needed psychotherapy techniques. Hope this answers your query. Available for further clarifications. Good luck.