Was given amitriptyline for lack of full anal sphincter function (basically, poop gets stuck & i can urge it out). not constipated. will this help it?

Not sure: Amitriptylene has certain side effects which oppose bowel activity and slow it down. Constipation can result. If the doctor's idea is that your anal sphincter tone is too high, amitriptylene could help. I'll add that if this doesn't work, certain homeopathic remedies may be more useful for you. You could consult a professional homeopath to receive the one most likely to work for you.