Aww I know the feeling! Whenever I'm in a hormonal mood I end up complaining to OH about how fat and huge I am!
Once I've calmed down though I realise I'm pregnant, I'm big for this reason and can't do anything about it until LO has popped out!
Make a vow to yourself to do a bit of exercise once baby is here, or maybe get your hair cut and coloured. It'll make you feel better once they've arrived.