Re: 3 week old sleepong through the night?!
My newest DS (4th baby) is a champion sleeper, too, and it's great! Don't worry about it, and enjoy it... seriously! He started sleeping 7-9 hours when he was 5 wks or so. As long as your DD is getting enough to eat and is happy and healthy, you're good to go! Enjoy the fact that you get some extra rest. Last night, my DS slept over 11 hours, and he is not quite 4 months old. I'm surprised by it, but I'm not worried. He has gained 3 lbs. a month each month so far, and I actually wish he would slow down, because he looks 6-9 months old already! Can't I have a little baby for a while? LOL Probably one of the reasons he has grown so well is that he sleeps so much. He is also happy, which is great, too (and may be because he is well rested).
Congratulations on your new little one!
Wife to the best DH since 1997. CDing BFing Mama to #1DS
12/2006 and #4DS
5/2012. Missing my angel