I feel like a slut

I'm a minor and I currently have a boyfriend. he asked me to send pics, not nudes, just pics of a skirt I wanted to show him. it's not bad at all, I'm the problem in this situation. I had this ex boyfriend who asked me to send nudes and, since I was really dumb, I did what he said. he sent them to his friends and I won't even say what happened after. I've been feeling like a slut for two years now, but when I sent my actual boyfriend the pics of me in a skirt, I felt terrible. I've been crying the whole night, I keep overthinking: "what if he..." and I can't think about anything else. am I really a slut?

I'm sorry for my bad English, I'm not from an English speaking country and I'm tired rn :(