((hugs)) breast feeding is hard until it is established. I don't know that formula is going to be that much better or easier, to be honest. If you want to continue breast feeding, it would be best not to add in the bottles, since it can cause some nipple confusion at this point. She will also get more milk from the bottle nipples. It takes more sucking work for a baby to get milk from breasts.
Whenever you have any questions about your baby, you can feel free to call your doctor's nurse. She will help you out.
Maybe there is a lactation consultant you could talk to... I know they can be very helpful.
Good luck!