Have them check for protein loss in your urine this might cause those symptoms instead of GI? There is a disease called Nephrotic Syndrome. This usually has edema (swelling in the feet, ankles, around eyes. However you could have vomiting and weight gain as well. Just a shot in the dark. I'm not in the medical profession, so please don't take this to heart, this is just something to read about. Don't be scared to come right out and ask your DR what he/she is checking you for. You are the one this is happening to and you are the one footing the bill! Best of luck! Keep us updated!
Why do you think you have cirrhosis if your ultrasound is fine? Did they rune LFTs?