losing supply?

Heather

I've recently returned to work. Before, I would pump and get 4 oz easily before bed. Now I'm lucky to get 2. AT work I've gone from 7 oz down to 4 or 5. My son is 6.5 months old. I'm not ready to give it up. Any ideas? I've increased water and started daily oatmeal. I try to pump for each missed feed (that he takes a bottle for) plus one extra (before bed). I'm nervous about fenugreek because I've heard it can hurt supply for some...