LNO, I'm glad you felt you could discuss your PND with DH, I hope he really does take it on board.
With the reflux meds, is he on Losec or Nexium? What dose? DD was on 20mg of nexium until 9/10 months then we weaned her off by doing just one 10mg dose at night, then a month later, took her off it completely.
It cant harm him to stay on it, so Id recommend sticking with it until you have less battles to fight with his feeding and sleep. Good luck.