Still Cramping on Remicade

Hey guys! I was wondering if anybody that is currently getting Remicade infusions is still experiencing severe cramping every now and then along with not being able to leave the bathroom for a long period of time. Brief background: I was on Humira for a little under a year and it didn't seem to be helping, so my doctor started me on Remicade. I was so close to remission and just needed something to get me in full remission. I have had 4 infusions so far. I go in every 8 weeks for an infusion. However, every now and then I get really sick with cramps in the morning and cannot leave the bathroom. I try to be cautious with food and not eat any trigger foods. I just don't know what to do or if this is normal while being on Remicade?? Also, my doctor always says that food shouldn't make me so sick, but I kind of disagree. For me, food plays a huge role in how I feel. Should Remicade still be preventing me from being sick no matter what I eat? I feel like it's all so confusing