You are in control, if you want it out just say so! (Tough I know) Just brace yourself and ask what your options are - then decide based on how you feel about it.
If you had TMJ you would really know about it, it could be all the work has irritated a nerve or two, but my understanding is TMJ is "normally" one sided. Anyway Oral Medicine (In the UK) is one of the specialities we get referred to for potential Nerve\TMJ problems
If you have the tooth out the infection if there is one should resolve and the Dentist should know when the tooth comes out if there is\was an infection.
Good luck impossible to help other than ask you to try your best to get what you want from the meeting, rarely do they do thing straight on the first consultation (in my experience) it will questions and answers and a look around\Xray etc. Although having re-read your earlier posts maybe it looks like you booked an extraction?
Good luck it will be all over soon!