Help!

I'm 6weels pregnant yesterday.. I cannot eat a thing but I'm always hungry.. If I try to eat I just want to pile... AND the biggest issue I'm dealing with is extreme crankiness and a very low tolerance for my precious 2 year old daughter!! I find myself crying multiple times a day because I've gone off on her yet again for something stupid! I usually have all the patience in the world for my little princess... But the past few days have been my breaking point! I just don't know what to do anymore!! I'm cranky because I'm hungry..but I can't eat .. And since I'm cranky I can't seem to deal properly with my little angel.. As soon as I loose my temper with her I start a fit of crying! I wasn't an emotional wreck when I was pregnant with her.. So this is all new and kinda scaring me... 

Please?? Any advice would be helpful.. I just can't seem to deal with it!! ????