First Time & Nervous

So just yesterday my girlfriend decided to take her 4th pregnancy test and all 4 came out positive. It seems clear that she's pregnant because her boobs are beginning to hurt. She's craving a lot. And some other side affects. It's our very first child on the way aaand we know little to nothing on how to deal with this experience. I'm just looking for ANY type of help on what type of good rated vitamins, foods, exercise she should take and do... really everything that y'all know will help greatly... Thank you