It is quite common for those with gastroparesis to have other AN problems like you mentioned.

Those with SFN do commonly have AN also...but that doesn't mean it's likely. Much of the answer would go back to what's the cause of the SFN in the first place.

The 'milkish' drink then scan during your annual exam does not sound like an empty test. It sounds more like barium used with xrays (upper GI series).

It will be interesting to see what the pulmo doc says about your SOB. Maybe it's a diaphragm dysfunction, since you're not wheezing, etc. I'm sure he'll figure it out.