Hi, I have a small bump on the roof of my mouth near the back that seems to have just suddenly appeared. It sticks out and my tongue brushes against it every time I move it. Does anyone know what this could be? It looks clear or flesh tone and that if I were to stick it with something sharp it would pop. I had another bump near the back of the roof of mouth a few weeks ago. But it was under the skin and it almost felt hard and pea sized.