I am far from and expert, but I would stop and think here. Here is my 2 cents after about 60 seconds thinking about your problem.
Was your food passing undigested before you started all this, or after?
If it has come after, then maybe you should take a break from all the cleansing. Maybe you are reacting with hives to some of the chemicals you are taking to cleanse. Maybe you are missing some of the friendly bacteria in your colon required to digest your food. You could try to add these natural digesters back and take a break from everything else.
On the other hand, it is entirely possible that the hives are a reaction to burning fats and your body dealing with all the toxins from the flushes. If it were me, I would still add back some natural digesters.