If you got really engorged when your milk came in, how long did it last? What helped with the pain and discomfort?

On the advice of some previously posted questions about this on HB and kellymom, I hand expressed to take the edge off, then had a good long feeding with the baby. It felt much better but still had some big lumps. Now a couple hours later I'm already engorged again. I don't remember it being this intense last time! I was reading my toddler a story and she accidentally elbowed me in the boob and I almost cried.

How long can I expect this to last? Milk came in last night, 4 days post partum right now.