Im 3 weeks today. Slept on my stomach last night. It felt awesome. I think everyone heals differently. It could be a few days for some folk or a couple of months for others.
I too sleep on my back now. Though i CRAVE to flip over and sleep on my stomach. Its only been 7 days since my surgery. Im too scared of what sleeping on my stomach would do to my wounds. So 1 week and no stomach sleeping as of yet.