Before you have a baby....

L
Just need advise.. Im 5 foot 4 inches tall and weight 163. I want to loose 20 pounds.. Does this seems ridiculous? I just started taking preplus a prenatal vitamin 12 days ago and stopped my birth control. My plan is to see how this cycle goes and then in october just have sex whenever and not worry about ovulation... Also fearing becoming pregnant.. My 2nd fear is my weight if we do become pregnant now much i will gain and if i could get it off.myob says you usually gain 20 pounds. I would really like to loose the weight before hand... I have not been successful.This is the heaviest i have ever been and I'm self conscious now i think it will be even worse if we become pregnant...i just want to let things go and be a wife that doesnt worry about anything but its really hard for me.. Just want to have fun practicing...lol I need baby steps..Help