My DD is 4 months old this week and exclusively breastfed. For the first 3 months, I had an oversupply of milk and could not express at all as I needed my body to work out the supply-demand. I was able to catch fast letdowns and my partner gave our DD a bottle here and there and she took them with no problem. I need to express a backup bottle for this evening whilst I nip to an appointment. But, I can't express anything! I have tried for 2 days now. I have tried as soon as she has finished feeding, the other breast if she has only drank from one or an hour after a feed. But nothing! If I express with my hand, I can get milk. When DD feeds, she stimulates fast let-downs in both breasts at the same time.
Is it normal to not be able to express? Would this affect DD's milk intake? Is it supply starting to slow down/reduce?