Bad day...

Had a job interview, it went great.  Should make today a great day, right?  But nope.  Some stupid ocd thoughts that I thought I solved seemed to shift and come back.  I feel sick to my stomache and just want to cry because I feel so guilty for something that i'm reasonably sure I did not do.  The 'what-ifs' kill me though, even though I don't think that there are any what ifs.  I'm worried about things that happened going on a year ago, and I can't remember every little second, but i'm pretty sure I don't need to worry about what I am worried about.  I'm just so sick of living like this, every day being a struggle to not be so anxious.  I just want to be able to live and have a few moments of happiness without feeling worried or guilty and ocd.  :(