My baby boy just turned one and has been nursing since birth. I have never had any issues with nursing or supply, until now. For the past few days our night nursing has changed. He nurses before bedtime, but wants more and seems like he is not getting enough from me. My husband and I gave him 4oz of formula after nursing and like magic he was happy and asleep. Is my supply low? Does he not want to work for it? A bit worried since I enjoy nursing him. Any ideas, suggestions?