I Uhmm Started To Have Sex With My Boyfriend A

I uhmm started to have sex with my boyfriend a few months ago the n i noticed that when i pee my pee has a different smell than it did before and then of recent i started to feel a little sore (forgive me for the details) but outside my vagina opening close to my butt like i cant tell whether the sore is actually on my leg on my bone or inside there cuz i feel it on the left side im really confused and worried about what this may be and i have been doing these very many squat exercises could that have a link to the little sore i feel