Sorry to hear you're flaring
I would agree, a second opinion sounds like a good idea. It can be hard to find a GI that you really trust (I'm on my 5th, I love him and will be devastated when he retires).
If you have antibodies to humira, you may do well on another tnf-inhibitor like remicade.
I agree that you should avoid steroids as far as possible.
When you eventually run out of medications there is surgery. I was faced with this prospect a few months ago, of course nobody wants to have surgery but now that I'm informed about
what it involves, it's a lot less scary and I've accepted the odds are I will probably have it some day. I "failed" remicade and entyvio (it wasn't really failure because they worked partially) and was put on xeljanz as a last resort. It worked for me when we least expected it (namely, 3 days after i booked an appointment to talk to a surgeon).
Hope you find some relief soon, it must be busy enough with the new baby!