Scared,
This is the hardest part of the first couple weeks. You just need to power through it because it gets better quickly. This is the one time I think the phrase 'One day at a time' makes sense. Get through today. Do it for yourself because you want to see what it's like on the other side when the cravings subside and you start to feel better. You want to see what that's like right? There's only one way to get to that place. Do it and two weeks from now you'll look back and say, I'm glad I pushed through.