What Does A Small Lump In Vagina Imply?

I have a small pea sized lump inside of my vagina, about an inch or two from the opening located on the gspot As I can not see inside my vagina I cannot tell you what it looks like. It does not cause pain or discomfort, and it s small (like a pea or smaller) but firm. It is not sensitive, it s just kind of there. I was cleaning myself with cold water to remove left over blood from my period, if I hadn t washed myself I never would ha noticed it. It s been three days, and it hasn t changed at all. I check it every few hours.