I've had that before! Fortunately, it was right when I started checking my cervix, and I had just gotten done reading TCOYF. It could be a nabothian cyst, which ususally will go away on it's own. Here's a description of nabothian cysts and the difference between a nabothian cyst and a cervical polyp quoted from TCOYF.
"[Nabothian] cysts are a fairly common female condition. They are little bumps that appear on the surface on the cervix and are caused by cervical systs which may become temporarily blocked. Women who haven't been taught about thse cysts may panic the first time they feel one, not realizing they are completely harmless. Women often feel them the first time while checking their cervix or inserting a diaphragm or cervical cap. They usually disappear on their own, but if they don't, you shoudl probably have them checked by a clinician the first time you feel one to rule out anything else."
"Polyps are small, tubular or ear-shaped growths that protrude from the mucus membranes of the cervical canal. Unlike nabothian cysts, which are quite firm, these tend to be somewhat spongy. And even though they are considered abnormal, they're almost always benign. you may be even be aware you have one unless you experienced one of their symptoms -- unusual bleeding. This is due to their vulnerable position in the vagina making them suceptible to being tapped, especially during intercourse. Theya re typically not painful, but may cause excess cervical fluid due to irritation of the mucus glands. If you think you may have one, you should consult a physician."
I'm not suggesting that you NOT see a doctor, but this information was helpful to me when I found one!