Good luck, my little boy suffered from nipple confusion when he was 2 months old. It wasn't anyone's fault, wasn't my choice to bottle feed, but I had to introduce it at the time due to him being sick.
It ruined my BF experience with him and it broke my heart, a year later and I'm still a bit sad about it. I beat myself up over it alot.
But in the same respect don't beat yourself up over it, it's so easy to get upset over it but just remember that you've got to do what is best for bub, and what bub wants. You're still a good mummy even if it doesn't work out, ok!!!!
Hope the ABA can help.