I am so sorry that you are so frustrated along with your frustration. I completely understand because I've been there. I went years trying to hide mine because I had deduced that it must be some sort of nervous, "anxiety" condition with my tongue in spite of my other jaw problems and indications that there was more going on. It was only after having an automobile accident and getting whiplash that caused many neurolical symptoms (due impart to a pre-existing genetic component) that I began seeing multiple different kinds of specialists and subspecialties of neurology, it was noticed that I hold my mouth that it was questioned and I explained it. They did cervical spine imaging, nerve conductivity testing, EMG, skin/nerve biopsies, labs, reviewed all of my medications that I had taken in the past couple years, etc to find the cause before a neurologist specializing in "movement disorders" diagnosed me.
My advise still is to talk to your dentist and see what he can figure out since the issue began after his dental work. He should handle any referrals if they are needed. If he does not. Then I would present the symptoms to your PCP for his opinion , testing and referrals. Until then, try to relax and don't jump to any conclusions. This very well could be very short term as a result of your extensive dental work and may turn out to be nothing to be upset over. Just follow up and follow through with your DDS & PCP until it has resolved.
By the way, dystonia/dyskinesias can often be treated even though not "cured". In my case botox injections have helped to manage my symptoms very much to the point of not being embarrassed and anxious from the uncontrolled constant tongue movements and sore mouth and jaw.
I hope this helps.
Try to distract yourself by doing something enjoyable until you can call your DDS Monday morning to get in to see him promptly.
I wish you well. 🤗