Ummm.....dieting mothers who are breastfeeding are NOT supposed to go below 1800 calories a day!!!! Breastfeeding (because your body is working to make a huge food supply for another person-averaging about a quart of milk a day!) burns about 500 calories a day alone-so this means that if you are eating 1800 calories a day, then YOU are actually getting 1300 calories a day...the milk factory is burning the other 500 and giving it to the baby.
If you did the Wendy plan or zig zagged at some of the calorie levels recommended-then for instance, on a 1300 calorie day you would only be getting 800 calories!!! This will affect both YOU and your milk supply. Breastfeeding mothers simply cannot use the same calorie guidelines as the rest of us. I know...I have BFed two children, and I am working on my third.
My suggestion is to eat 1800 calories a day-the lowest you can go right now-and to watch WHAT you are eating. Meaning-lean protein, veggies, fruit, whole grains...and to exercise every day.
I understand the need to want to look great at an event (I am going to look like a big lavendar Easter egg in June as a pregnant bridesmaid!!!) but it is really hard on a one month time limit-especially when pregnancy and breastfeeding are involved.
You can definitely lose 4-10 pounds by then doing 1800 calories a day, and doing some sort of exercise every day-but in a month, there is only so much you can do and stay HEALTHY, especially now.