It's the last point that I'm worried about. I've discovered that people tend to treat pregnant women like china dolls (like the woman who told me a few weeks ago that I shouldn't be lifting my rollaboard into the overhead bin) and it would be unfortunate if my FA had that mentality.
It's just SJC-AUS, not worth burning the miles on an UG, even if it does mean a non-exit-row seat on a 757.