MS and GI issues (TMI)

My stomach has been off the past few days. Crampy, bloated, and dark 💩. Some issues with urgency. I was taking an iron supplement but stopped in case that was the cause. I haven't taken any Pepto or Pepcid in the past 24 hours. My stomach can be quirky at times, but I am also feeling generally off because I am due for my next Kesimpta in 3 days. In the past, I've used a heating pad, but my MS is heat sensitive. Anyone else deal with this?