Losing the baby weight!

Just wondering what works for you ladies for losing the baby weight. I lost all but 5 lbs by my 6 week check up but due to stress and I think the birth control pill I gained back 25lbs. I am getting depressed about it and need some advice. I do need to change my eating habits but I exclusively breastfeed and feel hungry all the time. Anyone else dealing with this or is it just me??