Got a customer complaint while sober for the first time in a long time. Can't stop thinking about it. They said the service was slow. Well seeing as it was only my 1st time working a busy night, and it's a new computer system, and I brought the table a total of 12 tasters of different beer on 3 separate occasions...slow maybe but not lacking. So my manager comes up to me with a rough tone and tells me I need to ask for help if I need it. OK but it would take me just as long to ask for help as it would for me to do the task myself. Anyway now I'm in my own head about it and can't stop thinking how maybe I'm not cut out for this job anymore. These thoughts after excelling at it for 8 years, they aren't rational. I'm good at it. I've had so many positive interactions and my work ethic when sober is second to none.

I guess I'm just blowing off steam but my question is how to avoid all these negative thoughts and regain my confidence. I have very low self esteem, hence the drug abuse, but I have confidence in 2 areas. 1 is the soccer field and the other is on the serving floor. But that has been shaken and I'm worried about working a busy Friday and getting chewed out and being slow again. Any advice?