Vaginal infections

Hey guys. I need some advice on what to do and help on figuring out if there's something wrong. So a few months ago my boyfriend started getting strep throat after oral sex...we looked it up and found something called gbs(group b strep) we thought this could be a possibility that I have this. I wasn't really getting any symptoms, maybe a little itching but it wasn't anything to think of serious. I didn't get it checked because I wasn't entirely sure there was something wrong with me. Up until a few days ago I had sex with my boyfriend and it felt very irritating and not pleasurable at all. It didn't feel normal it felt like skin just rubbing against each other. My vagina starting to burn the skin got red and itchy. I bought this test immediately and took it after sex and it came out blue (which means ph levels are off and could be more serious than infection) and now three days later I take it again and I got a healthy ph level result. What could this mean? I don't know now if I should go see a doctor or not. Because the first test told me it's not okay and the second said I'm okay. I also never experienced anything like that during sex before. That was the first time. Usually it feels normal but since the beginning of my relationship (this is my first sexual partner) I haven't been able to have an orgasm. I don't know if this is all related somehow and I should get checked. I would appreciate any advice so much, thank you!!