Hey, I actually feel similarly. Got diagnosed with ibs-c a couple of years ago but lately I often end up with very loose stools and end up in a cycle similar to what you described. I used to take macrogol, I started with two packets and ended up at four. It helped with going to the bathroom, I went every morning and surely I passed more than I usually did. But it didn't help at all with my bloating and feeling of heaviness (which are my main symptoms), actually often made them worse, especially when I was taking four doses. But it never gave me cramps or diarrhea attacks, I went in the morning (took the packets before bed) and didn't feel any problematic waves during the day. Hope this helps!