I am normally constipated as a rule, but when I'm sharing space with a baby, it can get extremely unpleasant!!
I've tried soluble fiber and liquid cal/mag with fair to middlin' results: instead of eliminating once a week, I can now do it every day - however, 6 out of 7 days, I will eliminate teeny little "grapes" and then on the seventh day I will have a real, normal-sized BM.
I'm afraid to take any of those OTC stool-softeners in case it encourages labor, but I'm getting pretty desperate!!!