I did one of my flushes when I was 1 month pregnant and it went perfectly. I did not drink 2 Epsom Salt doses in the morning, and made morning enema instead. I had quite many average size oval green stones. This was my 14 flush if I remember well.
The only problem was that the stones that were coming out during the day, got clogged in my rectum and I felt like I was constipated.
Usually it does not happen when you drink all epsom drinks. So next time I will drink all the epsom drinks as it says in the original recipe, I'll just reduce the concentration a little.