Hello and congratulations. Remicade and Humira are class B drugs. I was on Remicade with my first and started having a reaction and switched to Humira. I was told that it is better to have your CD under control than risk a flare. The only concern is the last trimester. You need to schedule your last Remicade the 34th week (if I remember correctly). I hope you are able to get back on Remicade and have it work for you.
My daughter did come 4 weeks early but is completely healthy with me on Remicade the first trimester and Humira the last. Good luck and happy pregnancy