If you breastfeed you'll lose the weight quick I'm also usually a size 1/2 I gained 50lbs during my pregnancy and at 3 weeks into breastfeeding I'd already lost 33 lbs
this baby is my last.. at least for a good 6 yrs ( i may change my mind then and have another lol) but im gonna work my but off to get my pre pregnancy body back, i only had like 6 months before i got preggers again so i lost a good amount from that pregnancy and this time i havent gained hardly any so i think it can be done. ive heard walking a bunch after helps too.
It really depends on your level of activity before and after birth and how good you're eating. Fat gained from healthy food burns off easier than fat from junk food. I always shrunk down pretty fast after each baby. The slowest part for me was for my hips to go back in. I could get down to or almost to prepregnancy weight within a few months but it usually took about six months before i could get my old jeans to go back over my hips lol.