Pre-op Stomach issues

I did a little bit of searching and couldn't find much in the way of an answer. Here's my question : I am pre op, but not on the liquid diet part yet. There are days where I can eat one meal and be full all day and the thought or smell of food makes me nauseous. Other days, I am so hungry and feel the need to eat all day (or at least 3 good solid meals.) I am wondering why this is. Twice this week I have been feeling overly full and nauseated. Right now, my husband is grilling chicken which I should eat, but I still feel full from lunch over 10 hrs ago. I feel that if I eat, I will vomit. I'm very nauseous.

Could this be a sign of a "slow system"or of some kind of IBS? My surgeon had suggested that I might have a "touch of IBS."

Thanks for any advice!

If you have not done so be sure and post this on your surgery type forum also.  

I've never heard of this being related to IBS, but I've been a mild to moderate sufferer for most of my life and I've experienced the exact same thing you describe.