I have a 4 month old baby born perfectly healthy . . . I was on 6MP and Remicade throughout my pregnancy. My GI and several OBGYNs felt it was safe to take both medications while pregnant. I could not have done it any other way (I miscarried while off medications prior to becoming pregnant with my daughter). I know it is SO scary, but you have to keep in mind that there is really no guarantees . . . just make the best decision you can and never look back . . . the "what ifs" can drive you crazy.
Best of Luck!