Last year i went 6 days, took a break and then 8 days without food while working 8 hours everyday, it was tiring to say the least but you just have to Decide what you want to do and it becomes simple. After a few days you lose hunger and may have trouble sleeping but once your body adjusts you just become very weak and tired all the time. I also didnt stop eating cold turkey, i went gradually until it was 2 small meals a day, one, drinks, then nothing...but still i was drinking tons of water and it was only 6/8 days,so not sure what 40 would be like. Still keep this method in mind as an option...from the small experience its not that dramatic, just a matter of Decision making which i think is something to consider here, like Deciding to go to the gym or change something about yourself. Death is change and thats all youre doing. I wish i could be more elaborate, hope that makes sense- learning that nothing is going to change unless i change something, that goes with getting better as well as cracking down and Ending It.