Yes, my baby (now 16 weeks) did this too. In fact, I could have written that post at six weeks! Just yesterday I found (and threw away!

my food log from that time period, since DH was convinced that it must be a change in something I was eating. Our pediatrician said "he's just six weeks old!" and advised us to wait it out---and lo and behold, he outgrew that phase a few weeks later.
That's not to trivialize the other conditions noted above, since it's always possible that something else is going on---but it's also very possible that she's 100% normal and just going through the same phase most babies apparently do at that age (or so says our pediatrician).
Also, on the oversupply note---one thing I've found with my son is that when he goes through a growth spurt, he nurses frequently and a day or two later the milk supply bumps up supply (as it's supposed to). For the first day or two on the new "more milk" supply, he'll do the chokey-wheezy thing while eating to keep up, but after a couple of days it always balances out and he goes back to eating normally.
Good luck---hopefully it is just a normal phase (and fingers crossed that it passes soon---we just hit the four-month fussy period after a glorious six weeks of lovely nighttime sleep, so I feel your pain!)