I don't know what you cut out of your diet but if you want to lose weight safely my suggestion would be to cut sugar in all forms except whole fruit. So regular sugar and any wheat, flour, gluten, grains, etc. Everyone I know who has done this has felt fantastic. There's a book that has a really fascinating up front section on how certain foods impact our bodies. It's called the Everything Paleolithic Diet Book. It's also a cookbook. One of my favorite cookbooks is Paleo Comfort Foods.
Regarding nursing, I find it to be an integral part of my weight maintenance program!
I hope you get to where you need to be on all fronts. And big thanks to your husband for his service to our country!