Every antipsychotic can cause tardive dyskinesia except Clozaril. Your symptoms do sound like tardive dyskinesia but get a referral to a movement disorders specialist. That's a very low dose of Seroquel to cause tardive dyskinesia but its still a possibility. It may be cumulative from what you were on before as you did not describe your past medication history. The best thing to do is see a movement disorders specialist. If you need an antipsychotic they would almost certainly change you to Clozaril. That has its own set of severe side effects but cannot cause tardive dyskinesia. As well there are new antipsychotics in development such as the glutamate antagonists which are safe and effective and promote a fuller recovery that cannot cause tardive dyskinesia. I am on glycine, an antipsychotic in Phase 2 study that is under research and administered under the care of my psychopharmologist. There will be better antipsychotics out there to come but regardless if you believe you have tardive dyskinesia a referral to a neurologist to a movement disorder specialist would be essential. And I have found as regards treatments for tardive dyskesia that Zofran is very effective. That is an approved medication in study for tardive dyskinesia and its been of great benefit to me and other people. If you read this post and need any more information feel free to contact me.
Tardive Dyskinesia is scary stuff. I have taken cogentin in the past when i had TD, as a result of taking haldol. these newer meds like Seroquel are not supposed to have TD side effects, but like you, I think I have experienced them-- from antidepressants and other meds.
I had to see a neurologist at one point, and all the guy could do was check my reflexes and watch me walk, and tell me that if the meds are causing TD side effects to take other meds.
Not quite as easy as it sounds-- I almost have to take something, right now it is Prozac, I don't have the rhythmic TD side effects you are experiencing- I get stiff neck and muscles.
Since TD can be permanent even after stopping the meds which cause it, if it were me, I would see a dr/neurologist as soon as possible. Get evaluated. Sometimes switching meds can help.