Literally just graduated with a masters degree in teaching and I feel like crap.

Why is my brain completely incapable of cutting me any slack? Every time someone has said congratulations or given me praise, I take it for mockery. The better they know me, the worse I feel. I took a selfie at the ceremony and put it on Facebook before taking a closer look at it and realizing I think I look hideous. It was hot and the cap and gown were both black and I am visibly sweating.

I wanted to take some memos my students wrote on teacher appreciation day at my school and put them on my cap. Five separate students wrote a positive message about how nice I am in class. I couldn't help but think that it's only because I'm technically a substitute and I give them very little work, and that I'm actually a terrible teacher. So I left the memos alone and showed up with a plain cap.

This ought to be one of the better days of my life and yet here I am in my room drinking beer alone because I cannot help but feel like I'm a fraud and that everyone who is giving me praise is just going through the motions or outright mocking me. All I can think of is how I should have done more and need to do more in the future. Why am I completely incapable of feeling satisfied with myself? Some part of me expects to be laid off at the end of the year for no reason other than that I like my job so something just has to go wrong.

Please tell me other people know what I'm talking about or feeling?