Well Shelby sounds like your describing word for word Carcinoid Syndrome as in the symptoms of neuroendocrine cancer or carcinoid cancer. Don't know where you live but if I wher you i would get your wife to the nearest specialist which may be a drive as there are only a handful ok 6 in the USA that know enough to be able to effectivaly dx and treat this disease. go to carcinoid.org and ****.org to get the help that your wife needs I wouldn't waste a moment, Im no Doc but wow "if you hear hoofbeats then it must be ,....thats right, a Zebra !
Sepia is recommended also for stomach problems particularly in women. A dose of 6c is best to start with. 30c is what is normally sold, but it is too strong for some people especially those with heart problems. - Probiotics help with diarrhea also. I hope your wife gets well soon. :(
Some heart medications can cause diarrhea. She may need to have her Dr. change her prescription. She shouldn't have let this go on for so long as it can cause stomach damage. I have a lot of stomach trouble too and underwent a fundiplication to help with reflux. (Didn't work). So am going to try Nux Vomica from the health food store. Supposed to help with colic, stomach spasms, reflux, IBS, Chrons, etc. It supposedly also cures ulcers. I have found that if I eat coleslaw, it stops the symptoms temporarily. Perhaps she can try cabbage until she can get to the Dr. and she should ask him about the Nux Vomica.