LO will be 6 weeks on Saturday, and he was cluster feeding for the past week up until two nights ago.

The past two nights, he's given me a few overnight stretches of 3-4 hours (it had been every 2-3 hours). During the day now he's still feeding every 2-3 hours, but at least half the time he'll only feed on one side and then refuse to nurse the other breast. This is happening overnight now too.

I'm feeling engorged and like he's never totally emptying either breast. I tried massaging the right breast overnight when he fell back asleep after only eating from the left, and milk was shooting everywhere and now today it's extremely sore! I don't think it's a plugged duct or mastitis, but it feels like a giant bruise and really hurts during letdown (which is painful for me anyway).

Isn't supply supposed to regulate by now? I was very engorged weeks 2-3, then felt good up until now. Could the cluster feeding have given me an oversupply? Or is this good for the 6 week growth spurt? I pumped the sore breast today when he only nursed the other side, and I'm trying to offer it first for most feeds.

I don't remember having "too much milk" around LO1's 6 week growth spurt, but that feels like my problem right now. Also, LO2 has gained almost 5 lbs in 5 weeks (7 lbs 14 oz at birth, 12 lbs 6 oz yesterday at his 1 month checkup) - is he an overeater?