Hi Anne -
Another leader/mod chiming in with a little additional information. Your supply is naturally at its highest point in the morning, which would explain your fullness and the leaking. It does naturally dip in the evenings. There's a biological reason for this - it makes sense for a baby to NEED to be near his mother in the evening/as it starts to get dark and predators come out. A lot of us call this time the "witching hour" (though in my house it lasts for HOURS) and many babies choose to cluster feed during this time. They may nurse as often as once every 45 minutes for a few hour period. The theory is that they are "tanking up" for a long stretch of sleep at night, though my experience with my first child was that he'd just nurse like that, then still be up 2 hrs later as he was thorughout the night for the first year. Lucky for us he was an efficient nurser who fell right back to sleep nursing. Not too hard to nurse every 2 hrs if it's only for 5 mins!
I also wanted to share with you that my son, like the other poster's child, realy seemed to "grow into" my oversupply at about 12-16 weeks. Things started to improve dramatically.
I share Kate's caution about pumping too much in the morning. Block feeding works best if one breast is COMPLETELY unstimulated. Have you tried just pumping off that bit of foremilk (you want to pump only just enough to feel some relief, or to get through that strong first letdown if that is something your son finds challenging), then nursing on that side, then pumping on that side once your son is done? While this may not build up a huge volume for you, it should give you a little bit more to add to what you pumped before he started his nursing session, and every little bit adds up.
It might be helpful to understand what your primary goal is at this time. Do you want to completely eliminate green poops? Is your son having other discomfort with those poops or is it just greenish stools? It bears mentioning that sometimes it's just a cosmetic thing. My son was really fussy and gassy and clearly uncomfortable, on top of the greenish poops, but some babies don't have that discomfort. Not to say you should ignore green poops entirely, but if it's not causing your child significant other discomfort, it may be something to just expect from time to time. You also mentioned pumping for occasional outings or the upcoming conference separation from him. Is that a more important goal than eliminating green poops? My gut instinct says to wait on the pumping for the conference, do only minimal pumping for the occasional outings, while you work on managing your supply. However, as I mentioned, many moms find that by about 3-4 months their children seem to "grow into" their supply, and find that they don't need to work so hard to manage it anymore.
I should have asked this first - how is his weight gain? How does his doctor feel about his meeting milestones and overall growth and development? These are important factors too.
It is conceivable that your child is becoming a FAN of the fast flow/abundant milk supply. You mention he fusses sometimes, seeming to want more milk. It's not uncommon for these oversupply babies to develop a PREFERENCE for it. If you're interested, the kellymom.com (not a LLL site but a well-regarded breastfeeding information source) website has an article for what to do if this happens.
It sounds like you're starting to feel better about how things are going. congratulations to you for being so in tune with your baby! I hope things continue to improve.
LLL Leader, IL