I suggest that you refrain from any more colonics for a while until you figure out what's going on. It's probably a good idea to do the third of the series, but not at this time.
What your CT is saying makes sense, and I'm glad you have discussed it with your doctor. Is he/she an MD? Do you have access to an ND (Naturopathic doctor) where you live?
Did you originally go for a colonic because of constipation problems or as a desire to cleanse? Were you taking enemas prior to the colonics? If you feel enemas might help before you get back to colonics, be sure not to insert the rectal tip more than about 2 inches or so.