Lump?

Hey so probably a little too much information but I've seen some of the stuff on here so it probably isn't that bad, but I was just cleaning myself up down there and just got distracted and started feeling around and noticed that I have a lump on my labia minors, now I know I don't have an std of any kind because I recently got tested for everything and it came up clear, was just wondering if anyone else knew what it could possibly be? I only JUST found it so I'm going to go get it checked out if I get too worried about it or it doesn't go away, just thought I would see if anyone else has experienced this