Kudos Amy for pumping that long! I know exactly what you are going through. I pumped for a year with both of my boys and with my 2nd boy I ALSO donated over 5,000 ounces to 3 different babies.
Since life is changing up things for you now is probably a good time to change your schedule. As another posted commented I would begin taking fenegreek. You can take a few of them a few times per day to help increase supply. I would definitely suggest you do that for a few weeks to maintain your supply. You can find it at a health food store and probably at other places. I got mine at GNC.
As someone else mentioned drink lots of water. There is also a Mother's Milk tea. It can be found at Wal-mart and Kroger, among other places. It is with the hot tea/hot chocolate at the store. I'm not sure it really helped me increase supply from the tea, but it had me drinking water, which I think is what helped.
Keep a log of your output for a little while and make sure it is enough to satisify your daughter. When it is enough, then you can back off of the fenegreek., but do keep drinking the water.
Another suggestion, although quite difficult, is to get up in the middle of the night to pump. Also, you need to set a pretty strict schedule and adhere to it during the day and night if you pump then. In addition, you may want to purchase a car adapter and a cover to pump in the car. And the cover will come in handy at work, just in case someone pops in on you while pumping! (I had the technology guy and my assistant principal come in - with their key!)
Feel free to message me if you want me to help answer any questions or discuss a schedule for you. I'm right down the way in Conroe!
Good luck !!! You can do it!!!