If your disease is active, normal digestion can be painful depending on what is going on in there. You don't need food for the digestive process of paristalsis (waves through your intestines) to begin, the mere smell of food can set it off, so liquids can also.
I would ask the doctor for pain meds until your other meds kick in, but like someone above mentioned, entocort doesn't always work (never did for me) and sometimes takes time, prednisone may be a better option at this point for your acute attack.
Judy
25+years diagnosed with CD.
Numerous surgeries, permanent ostomy, adverse reactions to Remicade, finally off of Prednisone, hoping for a long remission from this last surgery.