I hope I haven't started this thread before already. I know I've thought about it, and I have mommy brain.
You know you're a nursing mom when ...
You think nothing of hefting your boobs in your hands in public to check which one is next up.
You evaluate all clothing by the criterion, "can I breastfeed in that?"
If you sleep topless, you lay a towel down on the bed first.
You have to weigh your desire for a cup of coffee against the knowledge that it will keep your baby up all night, leaving you sleep-deprived all over again.
You can type one-handed and in the dark.
Someone else's kid cries and you are just about ready to offer a boob when you remember that that's not your baby.
You yell at the TV every time you see a mother in a "primitive" setting leave her baby for more than three hours (Claire from "Lost," I'm talking about you).
Anyone have any more?