When is it time to consider finding a new GI?

If you can't get your GI to budge, and you've emphatically expressed your concerns, then I think it's time for at least another opinion, or possibly a new GI. Have you consulted with your family Doctor? He/she would be your best advocate. If you can get your family Doctor to consult with your GI, it might get some action on your behalf.

I agree with everyone else, at least a 2nd opinion. Sometimes there are compromises that you have to make with dealing with crohns and side effects but that is a very individual discussion that your doctor should be willing to have especially when your quality of life is impacted. They also should be going through any testing they can to identify causes for what you are experiencing.
* also be aware that when you take yourself of of the drug depending on how long you are off of it, you are more likely to have side effects and antibodies when you restart it.

As someone (with crohn's) who has been (previously) prescribed and who has (previously) taken Humira, I just wanted to add these few thoughts:
- It does seem (just to my personal opinion at this point) that it can be (very) difficult to get most Dr.'s to understand (well enough) when you are trying to tell them that you have really (really) reached a point (for those of us that this happen to) - a point where you just really want to give something else a try (ie a different treatment).
- I have, after going through the aforementioned experience above (for a long long while), I have now reached a point where I think I might have a little bit of insight (or else just a possible idea of a possible insight) to share. - That insight (or what I think might be new information, I am not claiming to know ANY certainty on this...) - but that insight is that it seems to me that a big (maybe even a HUGE) part of what might (and again, it's hard to be sure) - but what might factor into the thought processes that GI Docs go through when they are thinking over what treatment that they want to recommend to a patient, could be financial / coverage. -- And it seems like (going on what I've experienced) - seems like there might be a very real possibility that they are being actively concerned about giving a patient a recommendation that may (potentially) be difficult for the patient to be able to get (for whatever financial and or coverage and or whatever other reasons there may be in someone's exact individual circumstances). -- And in that regards, it seems to me that a lot of GI Docs may (again, just an idea, I cannot prove it) - but just may have the thought that Humira (though not inexpensive of course) may be among the easiest of (the more advanced types of) medications for major Crohns treatment for a patient to be able to get access to (in terms of financial means and/or prescription coverage means).

- That all being said, in my personal circumstances I have (now) finally tried something else. (Which is Stelara.) I do not feel like I can really say (at this point (not long after having received the first dose)) what I think about how I will be able to do with it / how the effects seem very much. All I can for absolutely certain is I don't think I have had any negative effects or else not any that seem significant to me. -- -- But going back to the issue of financial concerns for a moment, it did take a long time (many many days after) once the Dr. received test results and then called and said that he wanted to recommend Stelara -- it did take a long time after that to finally be able to get the first dose. -- And the reasons that made it took a long time were completely coverage related concerns and questions and issues and etc, which I would prefer not to go into, but the bottom line is just that -- it seems likely (to me) to be something (or else to be just maybe something) that maybe makes Dr.'s hesitant to want to even (ever) recommend something else (in the way of medications somewhat similar) when a patient does not feel happy w/ Humira treatment.