The gurgling is very normal. And it's not uncommon to have nausea in the beginning.
Are you getting enough fluid? Even slight dehydration can cause nausea, which then makes it even harder to get liquids in.
If you are getting two protein shakes down, I think you're good on protein right now.
Did you get any meds for nausea? If not, you can call your surgeon (someone should be oncall even though it's the weekend) and ask him to call in a script for you.
Kelly
Disclaimer: I am not a doctor and do not play one on TV. I've done a lot of research on vitamins but am not qualified to give medical advice. I'm happy to share my research with you, but you should see a health care professional if you want medical advice.
Check out my blog at: storyofmyservicedog.blogspot.com/