Should I be mad at myself?

I guess you would have to read my profile, and sometimes I forget people are kind of ruff, I was doing some laps in the pool the other day and after showering I was getting dressed and this guy saw me in my panties before I could get my clothes on, yes he joked me pretty good. I am usually pretty discrete and I change pretty quick. This time I messed up and got caught I really feel embarrased. I haven`t come out that I am even Bi, I just thought that by looking at me most people know and most are ok with it. I guess I should make that move right?