I may have to disagree a bit with marie- If you go with a faster flow you may run into the problem of your lo not accepting the breast (particularly if she is textbook or touchy). I would wait and try a couple other things before you go to this.
Have you looked in the newest baby whisperer book about this? I don't know if she speaks to this at such a young age, but her "method" of reintroducing the bottle worked for my little one- who had stopped taking the bottle at 6 weeks and was 7 months when we finally successfully reintroduced the bottle.
We, too, tried many different bottles and nipples and wasted what seemed like gallons of breast milk down the chin and chest of a very upset little one. I'd try Tracy's method, because for us nothing else worked.
HTH