congratulations! it's really quite a shock, isn't it? the head games that you'll be seeing are ASTONISHING - at least, that's been my experience.
just take it one day at a time. Don't focus on the next 16-24 months. You'll get through them soon enough - one day at a time.
get your protein and water in, and put one foot in front of another, and you'll be FINE!!! sooooo proud of you!