Hi Dave,
What an awful situation you are in! That must be very hard to live with. I'm so sorry you are going through this. I have no suggestion how to treat your issues except I can suggest a home remedy for a laxative that would work in place of the ones you buy over the counter. My mom always gave me this remedy. I'm 78 and still use it. It's natural but may be a little harsh. It's a teaspoon or more, if needed, of baking soda (the kind you cook with – Arm and Hammer) dissolved in a glass of water. Drink the whole glass. You may want to squeeze a little lemon juice in it to make it taste better. It tastes awful, but it works. Stay near the bathroom. It works fairly fast. By the way, this also helps get rid of gas and bloating. After it works, try and drink a lot of water to keep from being dehydrated.

Eating certain foods also help such as prunes, fruit, nuts etc. But you probably already know that.
I hope this helps you.
PML