Glad you took time out for a assessment. Sounds like a good plan.
I had a similar thing happen to me when for 4 consecutive days I couldn’t get past Day 1 on a new 7-day fast. At first, I thought it was a failure of willpower. Then a friend pointed out that it was probably my body screaming for a longer break. I realized she was right because I had been fasting in various formats for 41 straight days since I started my customized treatment protocol. As as a result I extended my 3-day ReFeed to a 9-day ReFeed. After that, and consulting with my endocrinologist, I then successfully completed the 40-day water fast.