Sounds like an anxiety disorder. I also had a difficult time with it and it became a pretty brutal depression. You should look at your own life style: How much time to you spend outside with friends, are you a social person? Try to communicate more with people. People with disorders like this usually are thinking too much. I know this sounds a little vague, but if you do most of the day nothing at home it can become something like this.
Are you in good shape? Do you have obesity or are you underweighted? Do something about it.
Also, don't be ashamed to talk about it with someone you trust. You can go to a psychologist if you feel it is getting out of hand.







