Did you BF tell you he had been tested or did you actually see the results?
Get checked out. It's probably nothing and knowing will give you peace of mind.
Make an appointment with a doctor or a gynecologist and ask to have a Pap smear (this way they'll know to prepare for it). They'll have a look inside and will be able to tell you firsthand what your situation is (if it's an STD, a non-STD-related infection, or otherwise). If you've never had a Pap smear done, be prepared. It can be an uncomfortable procedure. They will ask you to lie on the medical table (with a nurse present) and have a direct look at your vagina. They may also use an instrument that holds you vagina open for a clear look inside. Then they will swab inside to test for any usual or infectious agents (bacteria, etc.). It's a standard test that, as a young woman sexually active or not, you should have done once a year. It also screens for different types of cancer.
Don't be scared about smelling weird or looking gross. Doctors do these exams every day. Bring in a small list of your concerns and ask the doctor if there's time to go over all your questions (a list helps you not to forget anything, as once you're in the doctor's office, it can make you quite nervous).
If I were you, I would tell your boyfriend that you feel like you might have an infection you want to get checked by a doctor (heck, even say a yeast infection - that's not scary), and hold off sex until you see the doctor. It might actually be nothing and pain could be something unrelated to the bumps (which might turn out to be perfectly normal - the vagina can be strange looking organ if you only get the occassional glimpse of it).
One other thought: If it were genital warts, I'm pretty sure they'd show up on the outside of your vagina (not inside). As a woman becoming sexually active makes your vagina even more complicated to maintain and keep happy, so don't spare it the attention it needs. Don't be afraid to go get checked out and make sure everything is in working order. Good luck!