I know one breast usually makes less milk, but what do I do if I think I am decreasing in supply on one side? I really need both breasts fully functioning b/c I can only pump once during my work day. My lo prefers my right breast over my left. I can tell by the size and feel of my breasts that the left is producing less milk and the amount I'm able to pump from the left breast has decreased while the right has stayed the same. what should I do?