From what I experienced, I'd say it's more the result of the illness than the lack of confidence, but there's a little exercise I've been doing lately that helped me a lot. Get a camera (any camera) and do a "video diary". Talk as much or as little as you want/can about whatever you want.
The other thing I wanted to ask you is: How were you feeling EXACTLY before the break? This things are sometimes progressive, and sometimes they just get worse due to the use of some drugs. How long did your episode last? Could you briefly describe it?

Kind regards, my friend!