Acute pancreatitis help?

I realize there's a lot of topics here concerning ap, but I was wondering if I could get some more personalized advice here.
I'm 19 years old, and about 5 days ago I was hospitalized from sudden severe abdominal pain, which they diagnosed as acute pancreatitis. They gave me morphine and lots of intravenous fluids, and stuck me with a catheter to measure if I produced urine efficiently. Despite of what I've read on forums and online and stuff, the doctor actually told me to try to eat as much as I was able to without getting worse. He said something about wanting to prevent bacteria from the intestine to worsen the situation or something. They did an MRI to check for any gallstones, and they said they found something, but they needed specialists to decide how to deal with it. Anyways after 4 days I was released on probation, but I have to return tomorrow for a checkup and for the possible removal of the gallstones. They told me to drink as much as possible and eat well. I have some questions though.

First of, is it normal to get nauseous and dizzy from moving around? I also feel very bloated and it's difficult to drink as muh water as I need, any tips for that?
More long-term, I very rarely drink, I don't like drinking at all, so drinking being the issue here is very unlikely. I don't have any problem with quitting drinking all-together, but is it a bad idea to maybe very rarely take a fee glasses of beer or wine?
I'm not fat at all, I'm actually underweight, yet I love fatty food, will I be able to eat more fatty food soon? It would be really sad if I had to cut out fatty food forever.

Any other tips would be greatly appreciated thanks.