Breastfeeding blues!

Baby is officially 2 weeks old. I haven't tried latching her on in about a week because she just didn't seem interested and I was afraid she wasn't getting enough milk when she did latch on. When she does its like she only uses me as a pacifier lol. I pump only and she's bottle fed. I am producing about 2.5 ounces total every time I pump. Is that enough or am I just not going to be able to breastfeed my baby because it seems like she's hungry after. I always have about an ounce of formula as back up when I do feed her. I'm new to this. And feedback is greatly appreciated.