Yes I would feel the same. It is frustrating. You might want to start doing liverflushing. colonics or colemas only clean the large bowel. I would have thought colonix could have helped you with the constipation, but if it did not, then you are one of these people that have a "dry" body and it does not work for you.
You might try Oxypowder .">http://www. Oxypowder . com instead.
It will liquefy the fecal matter in the small intestines, the colonic does not reach that part. This page (may be 182) has about 3 differnt threads about the pro and con of bowel cleanses.
The other thing you should do is do kidney and lymph cleansing.
The liverflushing should also help for constipation, because you will create more bile that your small intestines need. I read this on Andreas Moritz website http://www.ener-chi.com Check under healthinfo liver/gallbladder/intestinal diseases.I think he also talks about the lymph gland. Not sure but there is a whole list of organs.
If you like his style and interested in one of his books I would suggest Timeless Secrets of Health and Rejuvination. He discusses every subject you can imagine.
Also start reading his forum Ask Andreas, may be you can find some old messages too.
You can type in at the top right ,google search,of the page ask andreas swelling and see of any messages come up or try like lymph etc.