Don't quit. Keep trying.
You have NOT "tried it all". I have not found every healing modality with promise, so I doubt you have tried more than I have found so far.
OTR is all about finding a better mouse trap.
If Theo Fleury is a fan of the Harmonic Egg, that's good enough for me. He's spent over 1M on different therapies, so he knows what works and what does not.