Poop TMI?

Des • US traveler. OR living. RH Neg life yo.
I'm almost 33 weeks pregnant, I was wondering if diarrhea was normal at this stage? I have ibs, and it has caused quite a bit of constipation during my pregnancy, but the past few weeks (without diet changes) I've had awful soft poop or diarrhea. I'm even taking iron supplements, I thought that would make me constipated. Not the opposite.