Tiffy,
Welcome to the world of Scuba. I know you'll love it.
I have to give you tons of credit,for being brave enough to put your weight on the boards. I know you couldn't pay me a million dollars to do it! OK, maybe a million!
Anyway, back to your letter. There are custom wet suit companies that you can give your measurements to, and they will make you a suit. They'll even put zippers on the legs to make it easier to fit and put on. I don't know the web links to them, but I bet someone on here does. I know for sure there is a company in Florida that does it, because my girlfriend down there did it, and has a great wet suit!
Or if you don't want to go through all of that, you can probably fit in a man's size medium or so. I really think most dive shops will let you try several on until you're happy.
Good luck girl! Hope to sea you underwater someday!