Welcome to the group. You've nothing to be ashamed of in your size, that's for sure. I'm the same size, by the way, so I do understand where you are coming from. Remember that we're in the upper 5% of penis size surveys, which means (assuming we can depend on the stats being accurate), we have bigger dicks than 94% of men.
Personally, I'm a grower not a shower, and that's what I'm less than content about, if anything. Guess I'd like to be swingin' with more ballast in the shower at the gym, but in the whole scheme of thngs, that is pretty minor, I think.