Welcome to the forum.
It sounds like alot of your symptoms, and fevers may be caused by remicade to me. But what do I know?
When you're better I would suggest you look into alternatives already mentioned here:
1) fecal transplantation
2) LDN - low dose naltrexone
Are you on any probiotics, like VSL #3?
Good luck with the remicade and I hope you feel better soon.