Hi E....the person who told you about Post Partum Depression is right on...you are eating for something other than being hungry. It is true you need a few more calories for breastfeeding but it is great that you are worried about this constant hunger.
What I did with my first baby was to stuff baby in a back pack (they've got such neat baby carriers since then...33 years ago!) and walk, walk and walk. You can't eat, there is so much to think about...fresh air and the rhythmic thudding of your feet, heart and breathing are familiar to baby. I walked 5 miles...in to town, had tea with a friend everyday and walked back...maybe a bit much these days even half that would be just fine. The problem with hunger and weight will solve itself. Just don't focus on food. Don't buy anything that is junk to keep around the house...just don't. Don't count calories. And heavens, don't count carbs...that carb thing is so full of bull it makes me mad. (I am a professional, for 35 years in fitness education and nutrition). Stay off your scale in the bathroom...better yet get RID of it. It IS not any indication of what you need to know, ever.
Buy fresh foods, cook from scratch. Get great recipes that make your mouth water and learn how to cook. Eat lots of little snacks. Focus on HATING the feeling of a full stomach. Never eat a huge meal (unless you know you might be stranded on a desert island in the near future). As soon as you feel you've had enough, stop. Push your plate away...or even throw the rest of your meal in the trash. It is ok. Soon you will be able to serve yourself only what you need and you won't waste much. But it is more important that you waste food than eat more than you need. Never clean your plate. Never go to fast food establishments, when you eat, be very picky about what you consume. Don't waste being really hungry and getting to fill your need with bogus food...go for fresh, gourmet, intelligent, ambiance and presentation. You won't find that at Burger King. Eating is so wonderful...good food is one of the most important things in this life...don't waste it. Learn to cook and be very, very discerning about what goes into your mouth. No cheap candy, high sugar sweets and no ice cream right now. Those kinds of foods will just make you desire them all the more each time you allow yourself to eat them. Just don't. Careful with bread as well. Instead, bake bread! Thick, chewy, multi everything bread that you kneed and kneed and kneed and when you finally get a piece you've earned it...
When you feel you and your baby need to practice being away from each other, and you find someone you feel confident with taking care of your baby...get to a gym! Just communicating with others (usually a sweaty, clothes scarce environment is a great venue for filling the 'love' need that you are currently filling with food). Learn about exercise, hire the best professional you can find...if you are near a college...TAKE ANATOMY AND PHYSIOLOGY.
Being truly educated about your body rather than only knowing the media's bull to get you to become more addicted to buying magic pills, cellulite creams (oh my...), special meals...counting calories and arghhh, counting CARBS...(makes me so angry) just fuels our capitalistic machine. They are using you. They want you to fail, become fat or think because you don't look like these women who are actually 'freaks' of nature or very expensive surgically enhanced women robots...well, you are more likely to be unhappy with yourself and spend more money trying to fix yourself.
Now that you are a new mom with surging hormones...you are even more susceptible especially if all you can do is read magazines and watch TV. Those 2 activities are the best avenues for brainwashing...and making you feel anxious that you are a bad person for being 'over weight' or maybe even that you aren't back at work instead of languishing at home with your baby. Guilt will make you hungry, big time.
Get your tennis shoes on (cross training might be best for not only forward motion but for lateral movement as well...you are going to be carrying extra weight-your baby- and you don't want to turn an ankle that can happen easily in running shoes) and get out in the fresh air. Don't worry about snow, rain...you can manage to keep your baby warm when it is cold and cool when hot. Just don't overwrap a baby when it is very warm, remember your body will be giving off a lot of heat as well. Have a destination, have a great cup of tea, a small meal, meet a friend, bring a great novel and then hoof it back home. You will get to where you HAVE to go for your walk. Then you'll be anxious to get back home to begin cooking that cool new soup for din din and your husband...life CAN be that simple and food is WONDERFUL.
Hope this helps, grins.
S.