Engorgement at 15 weeks?

I keep seeing posts about how people leak less and are not as engorged after the first few weeks of breastfeeding. My baby is 15 weeks old and is exclusively breastfed from the breast, yet I am engorged over night every night and often during the day as well. I would understand engorgement if she was sleeping long stretches over night, but I’m still feeding her every 3-4 hours and waking up with painful, rock hard boobs. In the daytime if she goes 3 hours without eating I’m way over full.

I had a pretty awful oversupply in the beginning and have mostly gotten that under control. I am down to only one intentional haakaa session midday to collect some milk to donate. Otherwise, I just sit in the discomfort of too much milk and hope my baby will get hungry soon.

Is this normal? At this point, is this just how things will be? Can I expect some improvement still?