Dr. asked to open and close mouth several times while he pressed on tmj joint. now right side tmj joint causing significant pain days later where there was none before. what did this doctor do to me!?

It is not feasible to clarify this, as far more data would be needed. Suggest your notify the specific doctor, inform about the jaw issues, and ask your question. See a dentist or oral surgeon and have this examined. An MRI might provide more information.

It might be a coincidence that you developed pain .May be that the Doctor examined you for pre existing TMJ problem and by opening your mouth too wide has caused onset of symptoms..You should avoid opening your mouth too wide and avoid eating hard food .If you have been advised TMJ treatment, you should not delay and take pain medication in the mean time depending on your health history.