Bump on vagina.4 days ago I seen it. Tryed to pop it nothing. Yesterday I tried again. Clear stuff came out & skin pilled off like a sunburn. What is it?

Maybe. A Bartholin's abscess that forms just inside the vagina. Be seen and if your doctor agrees, it will need drainage and follow up care. All the best.
Cyst. You might have had a cyst, which you opened and drained it, the overlying skin probably lost life and shed of. It may recur, if reoccurs have yourself checked out.