nauseous after eating or drinking

I'm a 21 year old male, non-smoker, non-drinker. Family history of gall-bladder issues and ulcers, and a bit of diabetes...

I've been experiencing these symptoms for a little over two weeks now and I need some help.

The doctor I saw thinks it could be acid reflux, but nothing I've found in regards to symptoms seems too convincing yet, I was hoping for some other opinions.

My symptoms began abruptly 16 days ago... I woke up at about 10 AM with a terrible burning/indigestion feeling in my stomach, and I could taste the dinner I'd had the night before with each burp I had... but as I got up and moving and went through my morning routine, this burning went away -- this was not an unusual occurrence at this time, I get this every few months and didn't think anything of it.

However, later that afternoon as my stomach became 'empty' and I got hungry I was overwhelmed by an extraordinary urge to vomit for about 20 to 30 minutes -- I chalked this up to low blood sugar (not having eaten all day), sometimes not eating can make me nauseas, but not like this typically.

-- Also, it wasn't a burning or painful sensation ... it was just really really uncomfortable, as if my stomach was spasming upwards or something...

Anyway, I went and had lunch on my break and came back to work a few hours later... but again I was feeling the overwhelming urge to vomit, drinking water only made it worse.

The weekend came (and I worked both Saturday and Sunday) ... and this feeling didn't return until I worked again on Monday and has not rectified itself since...

Only a few things can pass into my stomach without producing this feeling, #1 on the list is ice-cream, for whatever reason... Soup is a close second.

Fresh fruit however seems to induce this feeling/the urge to vomit pretty heavily (apples and grapes being the worst offenders)...

I saw a doctor, and she thought it was stress-related (like acid reflux can be), and told me to take prilosec every day for a while and see if it goes away, and furthermore to take Maalox if I felt like my symptoms were coming back.

The Prilosec has helped marginally, but my symptoms are still there, they make me particular susceptible to motion (i.e. driving)...

What's strange about all of this is that I still have my appetite, in fact the only time I feel 'OK' is when I'm really hungry (i.e. have not eaten all day) because then my stomach is empty... however drinking water too fast when I'm hungry can still make me sick.

-- Having fairly regular bowel movements, reduction in frequency/mass, but that's undoubtedly due to the fact that I'm hardly eating, at least compared to how much I used to eat...

The thing I'm worried about the most is my gall-bladder... three other family members have had theirs removed (one due to gall-stones, the others due to digestive issues).

I also just really want to hear from people with acid reflux to see if my symptoms line up a bit ... I could really use some help here, school starts up soon and attending classes like this could make paying attention really difficult!