I had sleeping issues before and after Remicade, with no real change in the magnitude of them. I come from a family of insomniacs.
As far as a firming of the bowel movements I haven’t noticed that. I don’t think you will see improvements for around 2-3 months.
You sound stressed out and looking for cause and effect reactions with Remicade. I would suggest you just relax, chill out and wait. For the sleep issues, NyQuil or the cheaper Walmart equivalent works well, you can also get a prescription for Xanax which should help.