The first 3 days our nursing sessions would last a good 45 minutes to 2 hours! Yes, I still had blisters the whole time. Especially on the right side because she seemed to like that side better! The purpose of her nursing so long is to get my milk supply to come in. Breastfeeding is supply and demand, so if you feed on demand your supply will try and match up with that.
I will say when I got home, Day 3, I was way more relaxed about the whole thing. I didn't have hospital staff in and out, I have a comfy bed to sit on, and it was just me and my daughter. It felt amazing to sit on my bed! My butt and back were so sore from the hard hospital bed....and probably sore from labor too :) !