i have today found a large lump at the entrance of my vagina. i first felt some sort of wierd feeling down there , so thought best have a look and theres a large lump. its on the entrance, to the right side and about the size of a marble. im worried. it doesnt hurt, although i can feel its there, . iv recently had a bad cough and cold, so i dont know weather iv popped out a muscle, but im scared. im 24 weeks. i have an appointment with my midwife on wednesday, so going to get her to check it then, has anybody else had anything like this?