Red Blister In Mouth I Have A Red Sore/blister(not Sure) In The Back Of My Mouth To The Right Of My Throat.?

I have a red sore/blister(not sure) in the back of my mouth to the right of my throat.? - red blister in mouth

I'm adapting to it hard enough, and my mother did not answer the phone) (under construction. It looks like a snowman 2 rooms with a large body and small head. It seems almost like blood and does not really hurt until I wash it in to the mouth, even if I did not hurt. It hurts a little to the right, but I'm not sure of his place, because I'm adjusting.

What are some ways to what could be?