I can imagine that is a major pain. You don't think this is related to hormones at all? Even if through menopause, we still have some hormones circulating around. Or we have a lack of them like estrogen which causes equal annoying issues. blood work would determine if hormones are being jerks.
Other common causes are hyperthyroidism. A blood test would determine that. Diabetes can cause this. Is your weight of the right target area? (no judgment if it is not, I'm working on that myself. :>))) But a thyroid issue could be the culprit.
If you are having any chest pain, go immediately to the doctor or ER.
But it really could still be associated with the depletion of estrogen you have experienced.
Let me know what you think!