I just wanted to say that you all should never worry about your age, or what others think. All of you sound like you know exactly what you're doing, even if it doesn't feel like it some days. At some point, age really will not matter.
My best friend was pregnant at 16 in highschool, and people gave her crap too. But, the thing is, she's probably the best mother. She's 32 now, and just had her 3rd baby (with 8 m/c between them all). Her 15 year old son is probably the best kid I know, and this world is lucky to have him in it.
So, please don't worry about these silly little looks. Just smile knowing that the world is a better place because you are bringing your beautiful children into it. You girls are doing a wonderful job!