Just that, really! I'm 8 weeks with #2 and when I'm not nauseous I'm ravenously hungry. Like, could eat 3 big dinners a day hungry. Like, 14 year old boy hungry. I wake up in the night starving and can't go back to sleep unless I eat.
My appetite is literally 3-4 x what it was pre-pregnancy (3 sensibly sized meals a day, no snacking).
Unfortunately it was like this last time too and I put on about 30kg 
(I lost it all plus 10 more though, happily!)
My weight gain was likely a contributing factor to me getting high blood pressure at 38 weeks and the induction at 40+1 that followed.... So would like to avoid again.
If I try to moderate the volume of what I eat (it's mostly healthy) I feel sick and like I'm going to faint. Like my blood sugar levels have collapsed, can't concentrate etc.
Advice? Commiserations.....?