Did you take IF #1 for a week before you started #2?
I just finished with IF #2 and I did not have the churning pain, I did have a lot of gas in the beginning with some pain involved and I did move a lot of mucus and loose stool in the beginning.
I took IF #1 for three weeks before starting with #2 because it felt right for me to do so. I wanted to have things already moving well before I started with the #2.
Try drinking more water as well, I had a day where I did not drink as much as usual and I remember having some discomfort that day.