Pumping at work

Hannah • Expecting our first miracle in December 2015 😊❤️
I'm currently breastfeeding and then pumping every 3 hours while at work. Over the past 2-3 weeks, my pumping output has dropped to half the amount. I eat oatmeal every day, take prenatals, eat a balanced diet, and drink a ton of water but nothing is working. I pump another 2-3 min after the milk stops too. I'm worried because now I'm not keeping up with how many bottles she drinks per day. (Thank God I have a small stash in the freezer) Just started fenugreek caps today. Anyone else dealing with this? How did you get your supply back up? If you take fenugreek, how much do you take?