Rain, I'm a big gal, too. I know how you feel.
Got a secret for you, though!

I haven't checked your thread where I asked if you were going to breast feed, so I don't know the answer. Howsomever, if you decide to, it will be a great big plus, not for just the baby, but for you as well! You lose weight a lot easier when you breast feed! Just make sure you eat the right things (call La Leche League!

) and it will drop off like melted butter!
Swimming is the best, all over exercise you can do! No stress or strain on your bones. I just wish I wasn't terrified of the water

or I'd be in the pool all summer long.
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Psalm 119:105 Thy word is a lamp unto my feet, and a light unto my path.