Re: Breastfeeding through the night...
There are also a lot of developmental changes that take place that can cause more night waking. It sounds like you've been home for about a week and a half? You might start by trying to gentle him back to sleep some way other than nursing with that first night waking. You can try rubbing his back while he's still in his crib and see if that helps. If you have a partner available, maybe he could rock your lo back to sleep. If you can at least get him to stretch out that first night waking after a few days, that might help you to feel more rested.
If it comes down to it, you might consider using your crib as a side car to your bed so you could both have more space.
FWIW, we started co-sleeping each night when DS was 7 mo b/c that was how we could cope with his lighter sleep patterns, so it's not terribly unusual for this change to take place.
DS 1/2006 9 lb. 2 oz. 22 in.
DD 10/2008 8 lb, 2 oz. 20 in.