Day 3 and doing much better

Ok so I'm not so sure why 3 or 4 days makes a difference but evidently it does.  What is it about 3 days that gets you over the hump?  I woke up this morning not really hungry but still a little cranky and inpatient.  I think I am more inpatient with myself though because I slept until 11:00am./  Which I hate and is totally not like me.  I hope the day today brings me good success!!!