I was just curious as to how the dr. diagnosed reflux?  Was it by ruling out everything else or did s/he do an actual test?  I am asking because, as an active member of Le Leche League, those symptoms sound an awful lot like over-supply.  The milk starts flowing like a fire hose and the baby gulps down so much so quickly that they get too much and spit up the excess.

I had mild oversupply issues when my baby was around that age, so I would feed him a couple of times on the same side before switching and I never fed him with both breasts during one feeding.  He's seven months old now and well able to keep up with the flow.

Since my issues were only mild and it sounds like your oversupply issue is much more serious, I would HIGHLY recommend you find a local LLL group and go to one of their meetings.  They follow a cycle of topics that are addressed during each meeting, but they always ask for questions whether they have to do with the topic or not.  I think there is at least one new mother with oversupply issues at every meeting I attend and the leaders always have tons of advice.  There are also lots of other mothers at meetings that have worked through the same problem, so you can get lots of ideas (like lauren's idea of pumping one side, or pumping just during the initial let-down then letting the baby latch on, etc.).

Even if it really is reflux and not just oversupply, lots of women at the meetings have dealt with that as well, so I would still recommend that you check them out.  I don't think I could have gotten through those first few months without their support and advice.