I dont take anything other than the occasional asprin or tylenol.
I've been told all my life that I need dental insurance because otherwise it costs far too much for even a cleaning. Had a tooth ache that got worse and worse and one day i just could not stand it anymore!! I was expecting $500-1000 bill for extracting a tooth and more for the x-ray's and ect... Total came to $100. I was lucky enough to have had that available, but had I not then I would have asked about payments.
Basically what I'm saying is, you might be surprised at how ~cheap~ the service is. I'd get checked, as long as this is not an emergency such as extreme pain from a tooth, then you have the time to ask about prices and possible payment plans. Plus, I'd take care of it before it ends up costing far too much.
I had a similar experience with head pressure. It turned out that The drugs I was taking (carvedilol, lisinopril, simvastatin) don't work well when taken simultaneously. Once I spread these out everything was fine. Are you taking any new drugs?