I AM 5'3 And 45 Pounds Over Weight.. I had my twins 14 months Ago and it seems i Havent lost not one pound !!

I am Not Very Happy! I started eating right like 10 months Ago and Walking taking my kids To the Park and Just Non-Stop.. Why Am i Not Losing Any Weight??? I really Need To Lose Weight Fast! I am Going Out Of Town To See My Family. Have'nt Seen Them in 13 months So i wanna Show off my New Look. Please HELP!! Thanks
