Not a doctor, but seen and had a bunch of this, This looks like it is a Candida Albicans fungal infection. Get an Rx for Diflucan. This has had a chance to get out of hand, and should have been treated before. It may take a few weeks to clear it up completely rather than the normal 5-7 days.

Brian, stage 4 oral cancer survivor. OCF Founder and Director. The first responsibility of a leader is to define reality. The last is to say thank you. In between, the leader is a servant.