Not for the faint hearted!!
One of my friends who has a young son who suffers terribly with his digestion generally has said that when everything else fails a hot bath can often help to calm cramps and encourage movemement - also if after your bath there is still no joy (or rather relief!) get back in the bath and try to go in the water. Sorry if this grosses anyone out but it really can help, and with this kind of problem there is very little mess to clean up and you will probably feel so liberated you won't care!!
I had a rather nasty experience following my first aam week- I really did feel like I was going to die - as you can see I did survive and have made sure I take psyllium husks twice a day now and have had no further problems.