I don't know if you have tried Heather's Peppermint Caps, but they really worked for me. When I would have a IBS attack, I would get C up to 5 days (it doesn't sound as painful as yours), but it would make me uncomfortable & nauseated, I always said it felt like I was blocked. This was at the beginning when I was in my trial and error phase. During this time, I was also taking my Ledvid, which also causes C. Now I only take the Ledvid only when I have to. When I started taking the Peppermint Caps I started feeling better right away. I credit the caps for making me somewhat normal in the pooping area. I hope you feel better.
-------------------- Daisy
"Sometimes you are the Windshield, sometimes you are the bug".