I Have A Small Lump In My Vagina But On

i have a small lump in my vagina but on the out left side near my clitorus what can that be ill going in to see a doctor soon to have a look at it. i dont want to be concern about it but just information on what it could be. my last pregnancy i have my tubes tied if that also part of problem. i have split from ex over 5yrs ago to so having sex is not an option but i have met someone and getting involve with sex again. so any advice or information would help a little before i go in and see the doctor this afternoon.