Foremilk/hindmilk imbalance, Oversupply

Baby girl has green poo most of the time and seems excessively fussy especially at night. Several times a day she's fussy at the breast, fussing and pulling off over and over. She's seven weeks and I'm still dealing with a lot of leaking. Could this be an oversupply problem? Anyone experienced this?

As soon as I noticed the green bm I started really making sure I was draining one breast at each feed and alternating by starting on the breast I left off on. It hasn't improved so I've changed it up to only one breast per feed. If she's still hungry within two hours I offer just that same breast. It's been a little over twelve hours since I started that and she just had a yellow bm, so that's good. I hope it means I'm on the right track.

Anyone experienced this? How did you deal with it?