I Think I May Have Herpes - Itchy Labia

for about a week i had very itchy labia that were red and irritated, and burned when i touched it (very slightly). there weren't any blisters or anything like that. i had a lot of odorless discharge.. the symptoms disappeared right away as soon as my period came (3 days ago) but now i have a dry skin rash (dry skin with tiny pink bumps) on my genitals, buttocks and a tiny bit on my breasts. it isnt itchy or painful. anyone know what is causing this? im going to the doctor in 3 weeks (earliest appointment available) but i want some opinions. Hoping this is just a yeast infection although i have no idea if they can cause a rash. have never had a yeast infection or an std before.