Or more??? How soon did you lose it & did you gain it back?

I was over weight pre pregnancy. Well I got hyperemesis gravidarum and lost 40 pounds in my first two trimester. I've only managed to gain about 8 back. The doctor is fine with that and baby boy looks great. But I've been told to expect to lose more after he's born due to some of the weight if not all I've gained, because it's all baby weight and fluid weight. I've heard of mom's losing up to 30 after baby was born, almost immediately. If I lose another 20 after birth like some do, I'll be going from 220 pregnancy to 160 after baby.

That sounds really bizarre to me! What are your experiences losing weight after baby??