each one of us is so different while at the same time sharing similar wd's ... :)
in my case, i didn't have the runs for more than 4/5 days but wow,.. i did have stomach cramps!!!!... as sway has told you i thought it was my body detoxing and asking for his fix too.. i called them stomach restless "legs"... i kept drinking tonic water and of course, my valerian root to calm them , they faded away during my second week.
Perfectly normal for some people. My GI tract didn't get back to completely normal for 6-8 weeks, though the cramping wasn't as severe as yours, but it did creep up on me for the first couple of weeks. Imodium, taken judiciously, will help with the diarrhea, though probably not the cramping.
Good Luck
LD
it's not uncommon. some like to ride it out since it's our body trying to adjust and rid itself of the poisons. others take immodium. be sure to stay well hydrated. i used to mix pedialyte with gatorade because water came back up. hope you feel better soon!