I pump while I'm at work and I'm gone ~ 10hours M-Th. I usually pump 3 times a day. My schedule is something like this:

6:30am- nurse
9:00: pump I get around 9-10 Oz
12 or 12:45 pump: I get 5-6 oz
3:00 or 3:45 pump- 3-4 oz

Why am I making less and less milk as the day goes on? Also when I get home DD eats almost every hour. Is it because I'm empty?? What's going on here?