I will randomly get this small sore bump just on the inside of the vaginal fold, not on the lips. But where it moist, mostly after I shave, but it is ALWAYS in the same exact spot. It will be slightly sore, only sometimes will it get a white head, most of the time I just get blood from it and then it will reduce over 2-3 days. There is only ever 1. Is this an ingrown hair or shaving bump?