I have this hard white bump in my mouth, lower lip area. The bump touches inbetween my teeth while my mouth is closed. I started getting these little bumps(really small) when I'm feeling sick. Maybe they were cold sores? This only started happening about 2 years ago and I've gotten them 4 times so far. They all went away on their own except for this one. I started feeling sick again and now the one that has been here ever since has just gotten bigger over night. What could it be? It's not perfectly round or soft so I don't think it's a mococele. What else can it be?