I was just going to say the same as Caroline. If you want you can use lasinoh on your boobs prior to the birth but this isn't really proven to work. Instead what I recommend is to stock up on supplies such as lasinoh, ice packs, nipple shells etc to help you through the difficult bit. But the best thing you can do is get a network of support around you. Find out where your local breastfeeding support group is and ion what day they meet. Also arrange for a counseller or peer support to come round and check your latch is correct.
The main thing is to remember that the first few weeks are the toughest. Baby will feed very frequently - this is normal, not a sign you are not producing enough milk. Baby will also go through a number of growth spurts so the feeding will increase but will soon settle down. With breastfeeding it is always best to feed on demand, and with a toddler that will be tough for you. Perhaps think about getting a "special box" for Rebecca, with cool toys, books etc in it that she plays with only when you are feeding, then she too has her time with you.
I am rambling as am tired but make use of all the breastfeeders on here, they are a great source of support.
A good link for you
http://www.kellymom.com/bf/start/pre...eparation.html