Consider if the extreme constipation (I had that recently) is caused by one or more supplements.

I had made two supp changes at about the same time - adding in Melatonin and ground psyllium husk.

I added in the Melatonin based on a study of healthy-gut people (so not me) and the psyllium husk based on reports it is good for "C" and weight loss. However, the husk slows down digestion and that may not be good for a redundant colon.

I don't know which one, both, or neither of these supps slowed my bowel down to complete inaction, but I am better now and I am no longer experimenting with these supps.