Suffer Itchy Vagina After Sex. Found White Thing On The Vagina. Advise?

Okay so, i recently had sexual relationship with a new partner. We did not have intercourse but we did have petting. So after 7 days, My vagina was really starting to itch. These 2 days has been the worst. It itches a lot, so i took a mirror to see what it is. And i found in the area around the broken hymen there was like a white thing that looked sort of like a cottage cheese. I cleaned that up and than I saw that when i put a little pressure on the bumps of the hymen, a white fluid, sort of like a pus, comes out of them. I am very worried. Because i have never had any infectiouns yet and i would really be happy if somebody could give me an advice.