Hello #99594,
the different experiences can be possibly accounted for by the lifestyle you lived in between the two fasts, and in particular, the diet & food combinations that you adhered to.
Improper food combinations result in degrees of putrefaction and fermentation with the resultant toxicity, and therefore the second fast was dealing with the elimination of these metabolic toxins probably more so this time around, and which would result in the symptoms you have described.
If you stick to a properly combined wholesome and organic diet that is properly combined according to appetite, then the second fast should be a much more pleasant and enjoyable experience, and where the body will then concentrate more on the healing side than the elimination side, which will give rise to those symptoms you have experienced.