I"m sorry if you already answered this in another post, but I'm trying to catch up.
Have you started taking an SFS, like Heather's Tummy Fiber or Benefiber? Are you drinking hot peppermint or chamomile tea to relax you, ease the spasms and pain? Also you may want to check the ingredients in your oatmeal (if it's instant check to see if it has any dairy in it) and check your bread for HFCS and dairy. It will take a while for your digestive system to get used to ANY food, especially since you've been eating so little for a while. You'll probably need to incorporate new foods into your diet slowly and a little at a time, after a good base of SF. I don't know if you've managed to get to all the info on this site and the boards, but here are a few links that may be useful: