Weightloss came to a Halt!

Haidee • 30 yrs old- female
I lost 20lbs within my 2wks pp, I know 10 of it was due to baby & labor. But now here i'm at 3wks and does this mean this is it? Now I will need to try harder at losing the other 20lbs I gained? 
Anyone lost 30lbs+ naturally without having to try too hard?