Hi There. For A Few Days Now I Have This

Hi there.

For a few days now I have this pain on the right side lower gum the inside near my tongue. Whenever I brush my tongue up against it it feels shrivelled and aches ALOT. It has effected me with eating. Also when I yawn, talk and chew it's just starting to cause me more pain every day. I keep doing mouth excerises to just overcome the pain. But it's starting to worry me. Please help