I can only ditto all the excellent advice already given, especially increasing your water intake and nursing before meals.
You're also nursing on demand which is huge. I successfully nurse my babies until they are two and I believe the biggest contributor to my success is nursing on demand, no matter what, no matter where. The second year is laxer since they don't depend on me 100% anymore, but for the first year my babies are with me 24/7 with very few emergency type exceptions. No pumping for a day out shopping sans babe, no pumping so I can drink for whatever occasion, no pumping so someone else can bottle feed overnight or to give me a break or for the babysitter etc... I've known many moms who take advantage of the convenience of pumping and then can't figure out why they are losing their milk. Nursing is a very "use it or lose it" function and the body's reaction to pumping vs nursing a real, live baby is very different. Long term nursing can be done with pumping but it's much more challenging.
I realize you have no choice when it comes to daycare but if you are not making exceptions other than that and you nurse as much as possible and as regularly as possible at all other times, you will be better off and have a higher chance of keeping up.
If you don't like beer there are lactation cookies that are made with brewer's yeast so you don't have to drink beer. There are many recipes online, if you google you'll find one that looks good to you.
There's also Mother's Milk tea.
http://www.vitacost.com/traditional-medicinals-organic-mothers-milk-herbal-teaThe good news is if your goal is to get to a year, you just have a couple more months to hang in there!