I've EBF my LO for 3months ...with an occasional pumping session here and there I would get about 4oz a session. I'm back at work and pump at work (every 2.5-3 hours) and I get between 3-4oz a session - this is the same amount I made a few months back...shouldn't I be making more?? well...LO is still gaining weight...but I have to supplement now with 1 bottle of formula a day to keep up with his appetite...is this a supply issue? or the pump just isn't that effective? anyone else go through this?