Re: sorry...gotta ask a couple poop ??
Constipation is very rare in EBF babies. How old is your DS? Has he been nursing as much as usual? As long as it's not VERY hard, it's probably not constipation - just a normal variation in consistency. Maybe try to offer the breast a little more often over the next few days to make sure he's getting enough.
For yourself - water, water, water! Keep a water bottle filled all the time - if it's there, you'll drink it. And get a good wrap or carrier so you can go on walks (Ergo, BabyHawk, woven wrap, ring sling...)