I know you are a PT but I think it's incorrect that you always try to steer people away from doctors. Doctor's have a much broader level of training and are supposed to do the initial diagnosis. Additionally, many people need to the have PT prescribed by a doctor in order for insurance to cover it.
I'm not knocking physical therapists. They are an important part of the system and truly help people, but they are not a substitute for doctors.
My reasons are different than you think. Even if I didn't have stock in the PT field, I would suggest this patient see a physical therapist. My reasons, in this case, are as follows: doctors cannot actually evaluate the TMJ or low back (unless they are an orthopedic specialist or chiropractor), physical therapists can evaluate and treat all at one place (if the state doesn't require you see a physician beforehand), and it is the most effective conservative care option out there. The TMJ's pain is likely mechanical in nature. PTs are trained to evaluate and treat the TMJ, while most healthcare professionals are not. The low back pain - yes, I agree that the OP could see more than one practitioner for this. However, since he may already be going for a TMJ issue, it is cost effective and convenient for him to visit the same person for the back problems. I worry about a general practitioner throwing a lot of antiinflammatories or pain killers at the OP, him running out of the drugs, and the symptoms coming back. The doctor, in that case, wouldn't do anything but minimize the symptoms without addressing the mechanical issue.
If the OP had other signs, such as migraines, upper motor neuron signs, weight loss, etc, then I would definitely suggest he see a physician at once. These are things I don't evaluate or treat (without a diagnosis and other intervention). I understand what you're saying and I make an honest effort not to be "that guy" who just sees everything as a PT problem. I would (and frequently do) refer patients to neurologists, internists, orthopedic surgeons, rheumatologists, in a heartbeat if they're displaying symptoms that warranted it
