depressed about weight

Pre pregnancy weight was 157
Just had my baby Friday 1-6-17 and weighed 187
So Gained 30lbs
I'm 3 days post baby and I'm only 185???
But my baby alone was 7lb 8oz???
I don't get it. Only have swelling in legs and face some... 
Any advice :( 
Was hoping to get to 150 by 6 weeks