These sound like potentially serious side effects that need immediate attention. I recommend that you see your primary care doctor
, or the doctor who is prescribing your psychiatric medications, right away. If you cannot get in right away, you should go back to the emergency room for another evaluation.
Dystonic reactions to medications like Seroquel are relatively common severe side effects, and they can occur at any time while taking the medication. If you are still taking the medication, the first thing to do would be to discontinue it immediately while waiting for medical evaluation. Although you are right that dystonic reaction is usually quite uncomfortable and painful, sometimes it can be atypical. Nevertheless, if this is what you have it needs immediate treatment and also a change in your medications, with avoidance of Seroquel in the future.
Another possibility that needs to be ruled out is something called tardive dyskinesia, which is a rare side effect of medications like Seroquel that can cause uncontrollable (non painful) motions of the muscles. It is important to diagnose this condition right away because it is sometimes not reversible, especially if you continue to take the medication.
Go see your doctor right away!