Why is the devil tryna tempt me?!

Been on keto diet for 3 days and lost 5 lbs so far. I’m doing great and being really strict with myself which is a huge accomplishment for me - I tend to have zero will power. I’m minding my business working at my desk and I keep smelling delicious pepperoni pizza while I’m snacking on celery! Ugh! Lord give me strength! I RRREALLY wanna stick to this!