It is normal to get more milk in the morning. You are probably going to keep increasing if you keep at it. However, it really is advisable to get up in the night to pump in order to take advantage of the increase in prolactin levels at that time. It might take a few days to make a difference in your supply, though, so if I were you, I'd at least try it for 3 or 4 nights. How much domperidone are you taking? Many of us need 120 mg/day. Good luck to you, and keep up the good work!
-Jennifer in Michigan