Gem, hang in there hun. You are doing really well and it will get easier. I think you are on the right track with trying to calm her as much as you can before a feed. Sometimes just giving them a finger to suck on can help too. Also, there are some positions that work better for large breasted mums. It really can be harder at first. Maybe some of these ideas would help you - Australian Breastfeeding Association - Breastfeeding With Large Breasts.

Let us know how you go today hun