What Is The Treatment For Lump In Vagina?

Hi, my boyfriend informed me today that my vagina felt different. He told me he feels a lump about an inch in diameter about five inches into my vagina. He said it felt good honestly, but he was a tad worried. I am also pretty concerend we do not believe it was my cervix since we did not go deeper than normal or even as deep as we normally would end up going. I don't know if this is a normal thing orsomething to be concerned about. I didn't feel any difference honestly. Also I had a ultra sound a few weeks ago and everything was normal. I am not pregnant that I know of. I am on the pill and we always use protection dieting sex