I've had a lump before. When I was 19 I found lump. I tryed to ignore it for a few weeks, but it steadly got painful and larger. I ended up going to the docs, and they said it was thrush, which I told them it wasnt. So they tested anyway, and as I said, it wasnt thrush. Over the next week the pain got much worser and ended having to go back to the docs. This time I met with a trainee doc who put me on anti-biotics. Later that day I got rushed to hospital, and admitted for testing for all sorts, STI's (Was still a virgin), cancer and other stuff.
The next day I had an op to have the growth removed. Had a 11 inch insision (the lump had grown so big it was now outside the lips). 4 Days later I was allowed to go home.
It turned out to be a really nasty cyst that if the first doc had spotted could have been treated normally, but alas the silly cow didnt spot it. Now just got a bloody great scar along my bits.
I really hope that its nothing sinister, and is easily treatable or totally normal. I know its hard, but try not to worry x