Help with oversupply/fast letdown

[VictorianSqualor]

I've read on kellymom what they say, but it's leaving me in pain.
I've tried feeding on one breast and the other leaks everywhere and really hurts.
If I don't feed every four hours, (DS has been sleeping six at night before I wake him because it hurts so much) I am engorged and leaking.
Tips on how to help it sort itself out without hurting me please?

It's starting to settle down a bit already.
I have been feeding from one breast per feed and hand expressing a small enough amount to ease the pressure on the other breast.
I'm only giving both breasts on his cluster feed before bed now, or I'd be in agony by the time I went to bed with one breast having to go too long between feeds!