Help my breast milk deceased

Brandy
So my milk took a decease significantly I was told to drink more water. I hate water it tastes like metal but I try to get over the taste and drink it anyway. And I was told to eat oatmeal I love oatmeal but none of this seems to be working. I went to pumping out 3oz each breast to damn near 1oz. (Sorry for my language) this is depressing. So to give my water some kind of taste I added fresh mint, lemon and cucumbers. Is there anything else I can do to bring my milk back?