help please!

[naflharrison]

im working night duty at the moment which is from 10pm to 8am, i dont eat alot on my days of and get a good 7 hrs kip on my nights off, when im working i dont eat junk all night but eat fruit, wholemeal toast and low fat yogurts as i dont want to add even more calories to my daily intake given that im consuming food over a 24hr period! what i want to know is that if say i get up tomorrow at 8am and do my usual day of looking after kids and housework then go to work at 10pm work all night and them stay awake all day sunday when i get home, i know its not healthy to not sleep after such a long period but sometimes impossible if hubby is working but would my metabolism change or speed up i.e burn more calories to help keep my body going for that length of time or would my body store fat to keep me going? trying to loose weight but end up feeling bloated with being up all night but have been really hungry all day today and just want to eat! have had 2hrs sleep since i got up at 8am thursday and am heading to bed shortly but again i feel so hungry! i know its not healthy to not sleep after a night shift but i can handle it so far and only do it when really neccessary! sorry this question is long and gobbledi gook but head is like a bag of spanners at the mo with being tired so if you can make head nor tail of it ide appreciate some help with this!