Pain in lower right abdomen

So everytime me and my SO have sex, I have a pain in my lower right side. It gets intense if he is really giving it hard for me so I always have to kill the mood and say to go slow. I have also had a string of UTIs before and I am afraid if it's related to that. Going to the doctor is expensive for me since my insurance company does not extend my benefit to that unless it's accidental or something. If anyone has any kind of home remedy for the problem or if anyone has any idea what that problem even is, please comment below. It would really be a lot of help. My sex life is going downhill because of this. Though my SO is very patient with me, I want to solve this. Thank you.