From what you’ve described, you are currently in a binge mode/ mindset. You binge-fasted 32 hours in your first 5 days of IF. “Testing limits” is pretty much another way of saying “did it to the extreme” (aka, binge). Losing 6lb in 5 days is not sustainable (or healthy), and will certainly result in binge eating/ over fasting and perpetuating the cycle.
To change your mindset, you will need to also change your behavior. If you’re starting a new IF routine, and especially if you’re prone to binge behavior, I highly recommend you commit to at least one full, complete month of 16:8. Challenge yourself to stick with the same, middle-of-the-road routine for a long time without changing. It’s not a terribly difficult schedule, and by easing slowly into it (maybe move to 17:7 for the entire second month) you will not be doing anything extreme. You may not lose as much weight quickly, but aiming for -5lb a month is totally reasonable and within reach for 6-8 months, during which you will have built good habits to support this rate. If you cheat and fail for a day (this is very likely!) then it is very important that you go back to normal (normal caloric intake, normal fasting hours) the next day, and not try to “overcompensate”. “Overcompensating” is what starts that harmful binge cycle.
Good luck to you.