I tore my vagina?

So, recently when I been having sex my vagina feels dry and kinda burns towards the bottom of my vagina? But it’s only in doggy style or positions like it. If i’m on top or he’s on top it feels fine just a little dry. I experienced this when I first lost my virginity but it’s been years now. I had my bf take a look and he said the skin between my butt and vagina looked like it had a tear? but I can’t rlly see it myself. We didn’t have sex for a week and when I got back we’ve had sex 2-3 times a day since. At first I thought I was having vaginal dryness? But i’m only 17. We have been having anal and vaginal

lately Is it possible tht I tore it or am I dry? Should I go to the doctor? Someone help!