I'm 4wks post op too and at first I dropped 16lbs the first wk then I gained 5lbs back. went back to see my surgeon and nutritionist in tears as I told them I guess I was just meant to be fat because I was drinking my fluids only taking in 600 or so calories and what they told me was are you taking in at least 60grams of protien and eating every 3 hrs I wad like not really. so now that I literally time myself eating EVERY 3hrs and getting better at my protien intake This week im down to a total loss of 19lbs.