@earle I walked a few miles in your shoes. I was diagnosed with achalasia >40 yrs ago and suffered agonizing esophageal spasms on a near daily basis. Both wasn't an option at the time. I found that the use of sublingual nitrates or longer acting isosorbide dinitrate were fairly effective in providing spasm relief. I also used a dihydopyridine calcium channel blocker like nifedipine or diltiazam on a daily basis.
I eventually developed mega-esophagus and was subsequently diagnosed with stage 4 ESCC in 01/2019.