1. Most get a response to humira within the first 6 weeks. Feeling normal could take much longer, a few months or more. It really depends how much damage your flare did. Humira doesn't directly heal you. Rather humira mutes or at least muffles your immune system's call for an attack. Your body can heal itself a lot better then. Internal healing does take much longer than you or I ever want it to take. We want to be better yesterday. It seems like you have response from humira which is great! Hang in there, be patient, and you should continue to heal and it'll get better week-to-week.
2. Prednisone side effects do vary with dose. At 40mgs i had insomnia, rapid heart beat, night sweats, etc. At 20 mgs i had an insatiable appetite, wild mood swings, a puffy face, and not the other previous mentioned side effects. At 7 mgs I had a puffy face, acne, and some mild moodiness and not the other stuff. At 2-3 weeks after quitting prednisone, i was back to my normal.
3. I've never had cdiff, from what I've read some have one episode then they're done. Some do have reoccurring bouts of cdiff.
4. We've had a number of moms who've had happy and healthy babies while on biologics throughout their pregnancy. Here's a few links from our Resources section.
From conception to delivery: Managing the pregnant inflammatory bowel disease patientwww.ncbi.nlm.nih.gov/pmc/articles/PMC3974516/
The Second European Evidenced-Based Consensus on Reproduction and Pregnancy in Inflammatory Bowel Diseaseecco-jcc.oxfordjournals.org/content/eccojc/9/2/107.full.pdf