I'm 24 weeks and haven't gained anything this time - but I'm overweight to begin with and definitely not purposely avoiding weight gain. I followed my hunger cues exactly the same way with my son and I don't remember exactly how much I'd gained at 28 weeks, but it was enough to get me a talking to from my midwife. I think I gained 40 lbs total with him. I really think that unless you're eating nothing but cake every day, the body does what it's going to do in pregnancy and there's no use stressing over it as long as your diet is reasonably healthy.