Too Much Resistance Not Good?

So this week I decided to go on Monk Mode. That means quitting pmo, smoking, excessive internet usage & at same time I decided to go on a Dry Fast after 20 years of bad habits.

I am having success with the others but when it comes to dry fasting after the 2nd or 3rd day it's like my brain & body is having cramps & I end up breaking it while semi binge eating.

Am I taking too much too fast? Should I just stick with IF until I get the hang of it? I've read on some reddit post that you should take it one habit at a time so the brain doesn't notice and build a ton of resistance for failure.