What Causes Pain In The Vagina After Intercourse?

I m in a long distance relationship with my boyfriend and before we decided to get sexually involved we both went to see doctors and test ourselves for any std s or hpv. We both came out 100% clean and we ve only been sexually involved with one another. I recently had intercourse, and i came back and noticed that while washing the area it was very painful to touch, usually I would ignore the pain due to the thought that I was just getting used to his size again. I didn t notice it at first because usually after ever session i d wash the area, and regularly wash 3-4 times a day. On both sides of my labia minora stings whenever I touch it or stretch the area and I can see that the skin has been peeled and it became a pastey white, i did thorough research and the only possible reason could be from friction burn. However I did notice i have sores around my perineum and anus, could these also be from irritation? can razors cause these sores?