Pain and Itchiness in vaginal area

My boyfriend and I got physical one night. We did everything except for sexual intercourse, but it was a little rough/vigorous (rubbing, 3 or 4 fingers used, possibly teeth). After I went home, I was a little bit sore and it hurt to wipe after using the bathroom. The soreness went away after a couple days but then after that there was a terrible itchiness. Now in addition to the itchiness I have a stinging pain on my clitoris and it is very sensitive. The space between my vagina and anus also stings a lot and it hurts when I touch it or when i spread my legs apart. Since I have had yeast infections before, but not for years, i went to the pharmacy and took medicine for a yeast infection one day ago. I have no idea what this could be. The sexual contact was about a week ago