Which formula?

C

I have been EBF our daughter since birth and now I have to go back to work full time unexpectedly. Despite power pumping and using supplements to boost my supply, I just haven't been able to make enough of a stash in the last two days. In case I still don't have enough milk for saved up for tomorrow when I go to work, what do I look for in formula, what brands are great, what brands to avoid, etc. She will be 6 months old on the 10th. Thanks moms!