I have a hard pea size lump under the skin on the top of my vagina. It does not look like an ingrown hair and I cannot pop it. Any suggestions?

Try. warm compresses a few times a day for two to three days. If it still doesnt open up or is not painful at all, I would make a trip to your doctor to have it evaluated.
See a physician. It will be hard to give an opinion without seeing the lesion.