You are talking about a very rare subset of a rare disease in an ultra rare age. We are talking probably 1-3,000,000 type of odds. Your history of worry, and the obsessive compulsive nature of your thinking is creating symptoms. Trust me, I know really well. I am currently battling a worry over my speech as well. Tongue feels funny, indentations of the tongue, certain sounds don't sound right especially S's, Th, and CH....dry mouth, problems swallowing etc.
These are pretty classic anxiety symptoms of speech. I have been doing things like this for as long as you have been alive. Worry, then my mind creates symptoms real and imagined. I would advise you to seek out an experienced counselor in health anxiety.