Losing weight?

Melissa • 29 years old. Been married for 7 years. Rambunctious seven year old daughter. Lost our son at 18 weeks on 09.13.13. Finally got our positive 11.30!! Due 08.16!!
Anyone trying to lose weight, before getting pregnant? Both times I've gotten pregnant, I have a six year old and had a miscarriage in 2013, I lost weight right before. I know what to do to lose weight but it's easier said than done. I have a brand new nephew and I am just so ready to hold my own!! Trying for 72 months excluding the four months I was pregnant with my son.