Anxiety about dressing for social events

I'm about to go visit a friend of mine and I know she doesnt really care how I dress but like I'm having a lot of anxiety about wearing a tank top and some shorts even though its freakin hot out, so I'm waiting for my Jeans and sweatshirt to dry because I feel more comfortable in that. I was wondering if I'm the only one who struggles with this? I suppose some of it is self conscious now but I've always been this way for as long as I can remember