Crohns flare possible blockage?

Renee
Currently 18w5d and am in hospital for horrible abdominal pain on lower right side. Had an ultrasound and found I have a loop in my small bowel, they also think I'm in the start of a flare but bloods show no inflammation ( no surprise there I swear bloods lie ) 
Has anyone else had this and what did they do to help treat you and I know we can't have CT scans or X-rays and surgery is last resort?? 
Feeling very nervous and sad right now. :(