I've had one of those before, I think. It's almost like a pimple? Like a little red and sort of hard? It sort of goes away and comes back on its own.
Hello,
You need to be examined to help determine what this bump is. If I had to guess it may be a Bartholin's cyst. This results from the blockage of a cyst duct found near the opening of the vagina on both sides (at 5 and 7 o'clock if you think of the vagina as a clock face). That said, I haven't examined you and there are multiple other possible causes of your symptoms. You need to be examined and have a diagnosis made.
Best regards,
Dr. Downing