I"m a bit of a late comer to this thread, but I'm 23 and got all the same comments as the rest of you. I had only been with my now husband for 11 months or so when we got pregnant, I thought I would have a hard time having kids, and he thought he was soon going to be too old for kids so we didn't bother trying to protect ourselves. So I guess in a way Kailee was planned, but when we found out we were preg it was a lovely surprise as we hadn't really expected it so easily. But then just a few weeks after announcing our pregnancy we announced we were getting married, oh boy did the tongues start wagging then! "Don't you think its too soon" "don't throw your life away, you already ruined it by getting preg" (that person no longer exists in my book) and such things. And then no sooner has bubby arrived, people ask when the next one is. Erm, hello... can I recover from this one first! What if I don't want more bubs!
All in all, people just truly do not think before they speak, curiousity gets the better of them and logic goes out the window. Not that the explanation makes it any less hurtful!!!