I guess you could say in a way I started to gain almost right away cuz I always a pound or two right before my period and thats how it also was when I got pregnant, only there was a lot more to follow. In the first 12-13 weeks I didn't really gain much, like 4 lbs, but I sure felt like was a lot heavier in my tummy. Then around 12-13 weeks is when I started to really pack on the pounds and inches. I'm 24 weeks now (25 weeks tomorrow) and i've put on 23 lbs and gone from 120 to 143, and I don't even wanna know how many inches.
Oh yeah, i'm 5'6 but i've got really long legs and thats where all my height is, so i'm really short thru the middle and there's nowhre to absorb or disguise any of those extra pounds and everyone says they're all out in front even tho it feels different to me.