Laxatives

Im not 100% sure im pregnant yet but we are trying and we don't normally have to wait long. I have a condition knows as IBS-C which means my body is almost constantly constipated and i go 7-10 days without going and have to take laxatives - i didnt have this condition with my last pregnancy and ill ask a doctor if i do find out im pregnant. But does anyone know iflaxatives  would hurt if i am 3-4 weeks pregnant?!