Yeast infection or something else

I just got off my period 2 days ago. I had period sex on the last day of my period. It kinda hurt so I looked it up and it said it could be from friction because I wasn’t wet enough. My vagina kinda bothered me for the rest of the night but when I woke up I was just sore. Yesterday I had sex again and it hurt then to but not as bad and it didn’t bother me. Today when I got home from work and went to the bathroom there was some discharge but nothing in my underwear just on my vagina. I feel like my vagina is sore and kinda itchy. Idk if im just sore from the sex and need a break or if Im getting a yeast infection. I used one of the “the killer” boric acid suppositories and it still feels sore but not as bad. Can someone tell me if it’s the start of a yeast infection or maybe i have friction burn or something?!? I’d just like a second opinion before I go to the doctors.