Bump on inside of Labia minora

I have a small bump on the inside of my labia minora that doesn’t hurt unless I mess with it. I’m married and haven’t slept with anyone else in 4 years, neither has he. We have both been tested like a year ago and everything was negative. Is it possible to get a pimple there?

It really doesn’t look like anything. It’s the same color as everything else, it’s just a small round bump.

Help?