My rash started about a month and a half ago. At first it was a random small red dot, that was pretty itchy. There was a few on my stomach and a few on my arms and legs. I didn't think anything of it. It slowly started to get worse. Now I have a big rash on the back of my thigh that itches like crazy, and the same on the side of my breast. Now I started getting a vaginal itch. What could this be?