Need help bout sex y'all

I think some of you here have quite the experience, just need help T_T
We did some steamy position early in the morning today, I think my boyfriend broke my back T_T and now it's starting to ache, I've put 4 salonpas already, and after using the toilet, I can barely even squat wtf, and we did it this evening also, but I said, my hips hurts so he did it on the back, while lying down on bed, it fcking hurts y'all what to do T_T I feel like, this may affect me when I get old.