Hi,
It's a real shame that the doctor you saw (twice?) didn't explain what the bumps were caused by, and didn't tell you exactly what they were. There are a variety of things that these bumps could be, but the bumps you have can't be diagnosed online by anyone. You should consider making another appointment for a pelvic exam, with a different doctor. If switching doctors isn't possible right now, try visiting a health clinic in your area. I suggest being very specific with the doctor during the next exam; explain to the doctor what your concerns are with the bumps, and ask about any treatment options. Insist on getting some answers; you deserve to know what's going on with your body.
Good Luck