Yeah, I find the depiction of Padme's pregnancy to be confusing on a number of levels. I'll look for clues when I re-read Stover's novelization of Ep. III, but I don't know how many of these are addressed.

I suspect that the Jedi who encounter her know she's pregnant, but it just doesn't register for them as something to be concerned about - like, they probably assume she has her reasons for keeping it quiet, and respect her privacy since she's an important Senator and all that. And there's no reason for any of them (except for Obi-wan) to suspect that Anakin's the father.

I mean, the Jedi also missed Darth Sidious and he was hiding in plain sight the whole time...

(Of course, if Darth Sidious is manipulating peoples' perceptions of Padme in order to further his schemes involving Anakin, this might explain a lot. Especially if you think he also manipulated Anakin's conception via secret Sith techniques, too.)

I'm so disappointed - but not surprised - to learn that Disney has decided to make the Hutts less interesting by having them follow the conventional human gender binary. Boo. It doesn't make Jabba's fetish for scantily clad humanoids any less creepy, though.