I Had Sexual Intercourse Like 2 Weeks Ago And Did

I had sexual intercourse like 2 weeks ago and did not use a condom. My vagina was swollen after the fact for a few days. When the swelling went down I felt like I might have a very very mild yeast infection but it wasn’t noticeable enough to do something about it. A week later I started my period. During this time I had symptoms of a yeast infection. Bad itching, a little burning probably from scratching the itching. I took monistat and the bad itching went away pretty much. There is still a little bit of itching which isn’t normal for me because I never have that sensation on a normal basis. There is also brown dirt like flakes coming from the outer part of my vagina. Please tell me I don’t have an STD. That would ruin my life. Please help me. I’m losing my mind here. I will never not use a condom again. I just really want to know it’s a yeast infection or something