I Have Had Chronic Constipation For 3 Months. I Have

I have had chronic constipation for 3 months. I have no feelings of peristalsis and must eat HIGH smounts of fiber, take fiber supplement, heavy doses of manesium citrate, a product called "go easy"and miralax in order to produce a bm I can Push, Push through (use a squatty poty stool)

Who could treat the motility issue: have tried chiropractic for a month hoping to "awaken" nerves. Have degenragive disc disease, spinal stenosios , spodylothesis. Seve and left hand. peripheral neuropathy with decresing feeling in feet. I am 82 year old woman.