How Do I Pack For A Baby On A 2 Week Trip?

You should not take too much, as you will already have the baby, the buggy, the bag with bottles and all the other stuff you have to carry around, you don't need to be carting an oversized suitcase as well.
I imagine there will be a washer and dryer where you are going,
so take five changes of clothing, plus two sleep suits, a little blanket for travelling, one packet of diapers, as you can buy more when you get there, some socks, a warm jacket  or anorak, since it is winter, one track suit, and some vests for underneath.
You can find very practical babywear these days, take five outfits only, you can wash them, your baby does not need to look like a fashion plate from a magazine.