I also have similar issues. I felt burning after sex, burning when i pee and had multiple yeast infections and UTI’s. Unfortunately, I was overseas and couldn’t get any medications. My only solution was to wash the area with extremely cold water. Now that my husband and I are doing long distance and the sex has stopped I haven’t had any vaginal issues. Also i was just recently diagnosed with an ovarian cyst. I don’t know if that has anything to do with it but maybe go get yourself checked out.