my current pregnancy is ever so different to my other 2, with this one i have just had constant nausea and no appetite, whereas with my previous pregnancies i was ever so ill, especially my second son, i was in hospital twice on a drip as i was sick so much, and yet i was starving ALL the time, even if if i did bring it straight up! The sickness lasted til 22 weeks with both.
With my second son i put on 3 stone by the time i had him at 26 weeks, i am now 26 weeks with this one and havent even put on a stone altogether, so goes to show how different pregnancies can be.