too lazy to nurse?

I had to supplement in the hospital and now that my milk is in my 4 day old doesn't want to "work" for it! She cries on the boob, but takes a bottle fine. I tried a different bottle tonight and it needed a harder suck and she HATED it! I think she is just to lazy to nurse! What can I do to help now? It won't be possible for me to exclusively nurse so I will always have to use a bottle