Bowel movement issues due to spine. Me!

4 yrs ago I suddenly developed constipation,like my stool stopped passing on its own. Initially it was taken as a lifestyle problem. But nobody could handle it and it eventually developed into IBD.  it has been 4 yrs, I am on a restricted diet, well taught yoga, Pranayam, accupressure, naturopathy,hydro therapy ,vagus nerve activation, nervous system activation practices, naval correction, I have been given all sorts of medicine, psycho somatic, anti depressants, ayurveda, homeopathy. I reversed my inflammation with all of this but I still can't poop, despite having soft stools, I can't poop even when I have diarrhea and stool gets watery,it just does not come out. Done with endoscopy, colonoscopy, ct scan, ultrasound, x ray, blood tests, TB test, harmonal panel, stool tests.  the only thing that helps is magnesium glycinate that too 70% .No laxative work bcoz they change the consistency but don't give the signal to poop. Gastros have now asked me to see if it is neurological. Help me