OK to keep her awake you could try breast compression,
www.drjacknewman.com for the video on how to do it - I've seen it work on sleepy babies really very well, if your breasts are sore from being engorged you could hand expressing off some milk and then the nipple would be easier for baby to get a good latch on as well as the breast compression. The more you get inside her the less likely she is to fall asleep - it obviously takes more energy to nurse than it does to sleep so do be aware of this, make sure as well that she is not too warm your rooms should be around 18-20 degrees, and she shouldn't be overdressed - so if you're wearing a t-shirt she should wear the same plus a little body. I presume that her latch is ok and that that side of things are going well? Remember ear, shoulder and hip in a straight line, tummy to tummy and lips open like a book; you should see a little of the tongue just at the side of the mouth. Post again if you have any other questions.
