I remember this both times from my c-sections. I am overweight so I couldn't fit the bands that they are supposed to offer you. Actually, no one every offered me one anyway. But, I did get a hospital bed to come home to and it really helped. We put it in the living room so that I could be with the family and still be able to get around better. My doc just filled out a form and got the insurance company to pay for it.
I also got several king size and body pillows and had them ready to go. I put one under my side or my belly depending on how I was laying to help support it. Lying on my side actually took a long time, like at least 2 weeks before it was really ok without the pillows.
Good luck! I know its hard, but oh so worth it!