It's 50/50 hunn lol....If you've missed a period take a test at least 2 or more weeks after your missed period. If you havn't missed your period...Well you probably aren't pregnant.
If you meant, how big of a chance is it that you will get pregnant....I couldnt help you. But I think if I remember right... Its is alot easier to get preg after you stop taking birth control than it was before you took it. But dont listen to me. Well good luck with whatever you wanted! :)