I am still a virgin, so there is absolutely no chance of pregnancy. But my boyfriend tends to like sucking on my nipples when we make out. We haven't really done any of that for a week, but since the last time, my nipples have been really hurting, and have been seeping a clear/yellowish smelly liquid. I don't think that it is pus. They have been seeping for nearly a week, and every time I take my bra off, it seems like the skin has tried to heal but couldn't, and so gets stuck to the bra and torn off fairly painfully. I don't really want to go and see the doctor, as I am a bit self conscious, and don't really have the money to pay for one, so any help here would be great. What can I do to help my nipples heal faster, and how can I prevent such a thing from happening again?

Tell your boyfriend to stop sucking your nipples. Sounds like you are beginning to lactate, or make breastmilk. If this continues you will be breastfeeding your boyfriend.