Hi lenie...sucks to be continually going through this...good the CT scan came back normal, but not so good because nothing is definitive yet.
Are you still on the canasa...if yes, how often are you using them? You can use them up to 3 times a day.
Regarding the pain, etc....have you looked at food choices..sometimes an adjustment or cesation of some foods will help.
Are you on any digestive enzymes or probiotics as well?
The other thing....could be IBS as well....which can be food related. Your doc could consider to give you an antispasmodic to see if that helps.
What other symptoms are you having...bm frequency, urgency, bleeding, diarrhea..etc?
Hope the ultrasound results brings forth some insight as to what's going on.
hang tough....can you call the doc or even your GP to prescribe an antispasmodic..I use Bentylol which in the US is Bentyl..or dicyclomine.