Painful sex

Since coming off the pill since me and my partner are ttc I've been having more regularly periods which is good, but even after a week after I've stopped my period I'm finding sex painful in certain positions (e.g doggy) I have a doctors appointment in a couple of weeks (earliest I could get) but I'm a worrier and I'm scared it might be something that could potentially make it harder to convince, I've heard story's of women finding out they have all sorts wrong with them after they come off the pill, I've been on it 10years now and before coming off it never experienced pain during sex! Do any of you ladies have any idea why this might be happening please I'm a little worried 😩