Hello - I'm currently nursing my 2nd son who is almost 8 months old. I nursed my 1st son for just over a year. Honestly, I feel like pregnancy and breastfeeding helped me to form a healthier diet and lifestyle! I never could get myself to stick with writing down what I ate or counting calories (please...that drove me nuts and lasted less than a week!), but I don't think that is too important. You get so used to eating 6 or more small meals a day when you're nursing that it seems strange to ever go back to eating 3 times a day with an occasional snack in between. (For the first 3 months or so I had to have a small meal in the middle of the night or my tummy would be growling for it!) You definitely should still be eating breakfast, lunch and dinner, and I recommend that you do have something light but satisfying in between meals and in the evening (post-dinner but not right before bed). The trick is to make a healthy choice that still satisfies your sweet tooth. Ideally this snack will have some casein (slow-release) protein in it to help feed your muscles at night and fiber to help you feel full. A few of my favorite evening meals: yogurt, and cereal. They're sweet but healthy, and the dairy contains proteins that you need. They carbs in cereal burn off quickly so it doesn'y hurt to have it at night. I love yogurt and often throw blueberries into yogurt, or I stir in some flax seeds. Don't feel guilty about eating more than 3 times a day - in fact I believe more frequent but smaller meals works best for our bodies and our health (especially when you nurse). I still make sure to have something every 3-4 hours (used to be every 2 in the beginning!) I eat healthy but not "too healthy" - I can't stands the taste of most "health foods" out there. I've tried tons of those "health bars" and most of them are just awful!! Another sweet treat I've stumbled upon in this search for the good-tasting snack bar: Fiber One bars. Oats and Chocolate is my fav, PB is 2nd. They taste good, hit the spot as a midday snack between meals or craving curber at night, and have some fiber and protein in them. And did I mention they taste good?
Oh yes, and keep drinking plenty of water - I love water, and carry a water bottle with me everywhere I go, even if it's just around the house. I drink water all the time, especially when I nurse, which is very important. And just like someone else pointed out, sometimes we mistake hunger for thirst. It's amazing.
Anyway, good luck with figuring things out, and be patient. I'm going through the same thing - 10 pounds that are stuck there. I want them gone but realize I'll have to wait until I'm where you're at, when I'm done nursing my son. It will come in time. If you exercise and eat healthy, that's all you need. And don't worry about the number on the scale - worry about your body being at a healthy BMI and in proportion. Remember muscle weighs more than fat too, so if you do any strength training, keep that in mind.
Good luck to you!
C.