Hello, me and my girl friend used to have amazing sex.Now for the past few months she has been experiencing pain inside, to the point where i feel terible, she says it feels like i am inserting my penis in wrong, to me i cant tell, and she can feel a bump or lump on one side after we try, like i am irritating something , we have tried multiple posititions and it happens, i am still able to pleasure her ocasionaly but she has pain, im not sure if it is something i am doing wrong or if we need to visit a doctor to see what is wrong,