Flush at a minimum of 3 weeks apart. some say 2 weeks that isn't enough time for your liver to recover. But if you feel your body can do it every 2 weeks go for it. But I would wait every 3-4 weeks until your liver gets less congested and stronger.
The toxins you emptied are entering your colon and circulating through your system. It is why it gets you sick because of the lack of elimination following the flushes. After the flush continue a Colon Cleanse up until your next flush just keep your pathways of elimination open not just a few days after or before