Hey aqumseya,
Sorry you are going through a tough time. What you describe does sound unpleasant indeed.
Have your difficulties been caused by the Humira? I don't know, but you are not the first person to complain about such side effects. It is possible.
Some of these things do kind of come with the territory of having IBD like LuckyD said, so that is another possibility.
If the Humira is the cause you should hopefully know relatively soon. I think it can take a number of months for the drug to leave your system completely.
I remember when I came off antidepressants, it took months for the withdrawal symptoms to go away. It should have been out of my system in just weeks yet that was my experience. Sometimes we really don't fully know how a person will react to any given medicine.
I think you should just take real good care of yourself for the time being. Right now, you are numero uno ha.