Hello.....I am not "Fishnets", but I can tell you what an IBS-C attack is like. You get SEVERE on and off cramping and nausea. It's like having the flu without vomiting. It lasts for a couple of hours and when it's finally over, you feel like you just got over the flu. Then it takes a half to almost a full day after to recover where you actually have an appetite again.
I can't imagine what could feel worse C or D. It seems like D would give some relief because you can "get rid of" what's in your system, but then again I can't speak for IBS-D people.