I have TMJD and if that's the cause of your tight muscles there is no need to see a doctor raw. Yes, some people do get relief with a bite plate, not chewing gum or hard to chew foods, and resting the tongue on the roof of the mouth. I was diagnosed 20 or so years ago. The bite plate did not help me at all. I suppose the other stuff has but it's no quick fix.
TMJ is one of those conditions that has no "cure" nor is it life threatening. You can wait until you have insurance to deal with that.
However, I do wonder about the salty taste in conjunction with the tight muscles only on one side. I suggest that you call your doctor's or dentist's office and talk with the advise nurse. (assuming you have a doctor, just no insurance for the present)
You could try calling one or more of the clinics, ask to speak to a nurse, at OHSU (I think it has a different name now) to ask what conditions could result in these symptoms. Have you tried googling the symptoms? There is a sight called MedMD. I also recently saw a site advertised that uses a program used by doctors. I'll see if I can find it's address.
You could also call the Oregon Medical Association and ask for the names of medical offices that charge on a sliding scale. Your county also has clinics that charge on a sliding scale.
Here is the address. I haven't tried it.
http://www.everydayhealth.com/symptom-checker?xid=nl_Ever...