I nursed exclusively for 2 days but ended up having to pump due to having too strong of a flow, and pumped for 7 days and then quit cold turkey, with exception of one small pumping session to relieve pressure, because I couldn't handle pumping with my lack of sleep and PPD. It took me about a week to get to the point where my breasts no longer hurt, and two weeks/almost three before I could finally stop wearing pads in my bras. I am almost 2 months postpartum now and I still leak if I squeeze my breasts but otherwise I'm fine.
At first I had issues drying up, but I started regularly taking Sudophed for my sinus problems, and that helped a lot with drying up faster, Sudophed is known to dry up supply. So I suggest trying that out, even if you don't have any allergy problems it won't hurt to take it.