Did you do a Colon Cleanse and parasite cleanse at the same time? You do know that they cancel each other out, right? If you do a colon cleanse, the parasite meds don't have time to work before they are carried out of your body.
It could be your Liver Cleansing and repairing itself. I had a lot of liver flukes once, and I had liver pain after a parasite cleanse.