Pelvic rest sex

Maybe tmi, I was put on pelvic rest for my placenta being  low. I haven't had any problems besides cramps for a bit. Well me and my bf had sex.. I didn't mean to it just well happened. I felt fine afterwords no cramping spotting etc and it wasn't for that long I guess you can say. I'm worried that I did something to my baby:( even though I feel like everything is 100% okay. Please tell me I'm not the only one who had this slip up, I know it's selfish of me to have sex.