The real question is : is it working for your crohn's. I am not sure how long you've been on it or what was going on before being on it. But for me, before being on remicade then humira I was in the hospital weekly with flares. I couldn't take it anymore, the pain the mental scarring, all of it. Yes I use to feel crappy the next day following the injection but that changes the longer your on it... now I can take it any day of the week because I know it doesn't effect me the next day (like it use to) I also do the injection right before bed to sleep most of the side effects off. Do it on a Friday evening this way you have all weekend to recope and then ready for work on Monday.
Aso like the last post, I was put on Methotrexate, and the side effect of this med is 100x worse then humira, maybe thats why I am totally fine now with humira the next day. MTX is a killer but geeeeez does it ever work!
Keep up with it I promise it gets better!