Hi I noticed you hadn't had anyone respond yet. I can't give you a personal anecdote but I can tell you Humira is a pregnancy category B meaning... "Animal reproduction studies have failed to demonstrate a risk to the fetus and there are no adequate and well-controlled studies in pregnant women OR Animal studies have shown an adverse effect, but adequate and well-controlled studies in pregnant women have failed to demonstrate a risk to the fetus in any trimester."
It would be best for you to have a talk with your G.I. or general practitioner to come up with a game plan to deal with IBD while being pregnant.
I hope you get someone with a relatable personal experience in here soon.
Gianni