Oh Angie ... hugs ...
Actually, the people in the US are very very tactful comparing to Israel. Seriously. And I can compare because I had my first and my third babies in Israel, and the second in the US (during our postdoc). In Israel, when my first daughter was little, I was asked DAILY when are we finally going to have a second kid. I wasn't hurt because it wasn't a medical issue - because we both were grad students, we decided to wait with the second kid a little (in the hindsight, of course, it would've been much better to have him during Ph.D., than during the postdoc; oh well, we are all smarter in a hindsight). But in Israel everybody has more than one kid, and the age difference between the kids is usually small, plus we were living in a suburban area, surrounded by young and rapidly growing families. Seriously, everyone from neighbors to parents of other kids in my daughter's daycare to her daycare provider asked me repeatedly when we are going to have another kid already. It was driving me nuts.
In the US, when I was pregnant with my second kid, I was huge. Seriously, the baby was very large (and he is still the tallest in his age group), and I was just enormous. Nobody, and I mean, nobody at all ever asked me anything. Amazing. The flip side is that I was using public transportation, and NO ONE ever thought to offer me his seat. Grrrr ... Imagine a very heavily pregnant woman, in November's freezing cold, having to stand for an hour in a packed train.
And then, in Israel again - the age difference between my second and third kids is really small, so they didn't have time to start nagging But sure thing, the congratulations came the first day I appeared in a maternity top.
Of course, now I have to endure the questions when we are going to have a fourth kid ... (and we are not planning!).