I’m 15 days post op and am slightly flatter on my back yet head is still raised above my bottom half, I think it depends how you feel, your body will let you know, Ive notice one of my incisions in particular has raised and looks a bit lumpy, still closed but I had revision surgery so he went through old scar tissue so this may be why but as I’m paranoid about pushing down on the incisons I’m still reclined a little bit, I cannot wait until I’m able to sleep on my side! X