Congratulations, first of all!
I am a mom of 4, I nursed all 4 of them. I think we had almost every problem in the book, so hopefully I can help out a little. LOL My advise would be that 2-3 oz is fine at this point. At 2 wks their tummy can't really hold much more than that. If she seems to be wanting more after you feed her, it might be a need to suckle for comfort more than hunger. If you want to get her to start nursing again, it can take some work, but it is possible. Every time you get ready to feed her try expressing a little on your nipple & offering it to her, she might taste the milk & try to latch on. Babies are lazy & they are just like adults, they tend to go with the path of least resistance. A bottle makes feeding very easy, they can gulp down a larger amount in less time & with less work. Nursing requires more energy, so she might resist at first.
I would also contact a lactation consultant, or La Leche League, they might have some ideas. There are a number of ways to get your supply increased, but the best way is to get her to stimulate you - at 2 wks they are also going through a growth spurt, so they naturally suck more - it's supply & demand, they nurse more often & your body responds with an increase in supply. If you just can't get her to nurse again I'd reccommend a reputable double pump (Medela is great) & pump a little longer until her growth spurt backs down again. Try to avoid a paci in this phase too - if she's wanting to suckle offer her your breast.
Sorry to have rambled on, these are some of the things we did with our kids. I hope everything works out & that you find something useful in my novel! LOL