I would suggest staying away from high glycemic index foods. I would also suggest utilizing Dr. Christopher's Panc T, containg several herbs that aid the pancreas. He has had success with the cedar berries in regulating blood Sugar levels.
The liver/gall bladder formula should not be a problem during pregnancy. Both Dr. Schulze and Dr. Christopher said that it is good to cleanse during pregnancy. Dr. Christopher suggested doing the three day cleanse every month during pregnancy.
I don't have my reference materials with me, but Dr. Christopher did recommend red raspberry tea to help with diabetes. He also recommends it very highly as a regular tea to use during pregnancy. So you may want to add that to your routine.