the most common thing to feel would be the end of your cervix. it is at the back of the vaginal canal and feels firm like the end of one's nose. often there are nabothian cysts on the face of the cervix which can make it feel irregular or bumpy. (nabothian cysts are clogged mucus secreting ducts--kind of like getting a clogged pore on your face. ) less commonly you might be feeling a vaginal inclusion cyst. yet these tend to be softer than the cervix. your best bet is to see your gyn and have them do both a palpation with fingers and a speculum exam to try and see if there is any type of cyst present.
i found a bump inside my vagina. it is about 4 inches up lumpy and the size of a nickel. it doesn’t hurt. what is it?