Dear Newbie,
I'm sorry about your nausea, but want you to know that from what I experienced, it's a normal reaction as your tummy learns to take in your nutrition in a whole new way.
I haven't heard from many RNYers that don't have some doubts during the first month or two. Be gentle with yourself, give it some time, and I think, and hope, that you'll feel much better soon.
Marin
ps I follow this site off and on, but this is actually the first time I've written anything. I think you're very brave to share your question at such an early stage in the process.
Good Luck!