I get into this situation very, very often.
I find advice from others to relax, or good luck, or... don't worry... winds me up even further.
I tend to take congratulations or bouncy 'well done' the wrong way.
I spend more than a year or so hunting for something to do, and having trouble settling with a new bunch, even when I get through a relentless interview, in an uncomfortable suit in the hot season
The only way I ever feel really good about things (school exams, uni, new job) is when the right attitude shines from within myself, because I know the facts are right, and I plan it all properly. If anything is out of place, I benefit better by calling it quits and moving on.
When I hear squawks from other people who aren't in my situation at all, it's useless and results in a compounding of less esteem.
I learn from my experience. The one and only person I can trust or gain from is me