The GERD pain tends to show up in the outer ears, at the same time I start getting upper-throat acidic
pain. The TMD
pain is in the inner ear, head, jaw, face, neck, and can radiate as low as the chest at times. You may wan to try something like Zantac (an H2 blocker) or Prilosec OTC (a Proton Pump Inhibitor) to see whether that helps symptoms. Of course, consult with your doc about this.
FYI, my first symptoms of GERD were about the same as yours.