You can try going to meetups, participate to the local developer community. There you will realize how much of your self-deprecation is justified or not. Identi

You can try going to meetups, participate to the local developer community. There you will realize how much of your self-deprecation is justified or not. Identify your weak spots and work on them, but also realize your strong points and use them to climb out of it. And yes, talk to a counsellor as well if you feel it helps.