I've never had a yeast infection before but I was just on antibiotics for strep throat and it was the week before my period which I know is like he perfect storm for yeast infections. My vaginal opening itself is itchy as hell and my labia is swollen and red. I can't tell if there's any abnormal discharge because I've been on my period and it's hard to tell what's what tbh. I have had unprotected sex but it was in late May and he said that he'd been tested and he was clean. Do you think it's a yeast infection or an std?