work stress = IBS type symptoms during pregnancy?

Lo

My company is under a federal investigation and I think the stress is getting to me. I kept attributing my stomach issues to pregnancy but after googling a bit I kept seeing stuff about IBS. I am wondering how best to approach management, to treat it like pregnancy issues, or like IBS issues, or both? I figure I should talk to my OB... or would a regular doctor be better? Anyone have IBS prior to pregnancy then during pregnancy, that could share any advice? Thanks everybody.