Hi Amber. After my 1 week check, the nurse said I was ok to lie flatter than the initial upright position and after about a week I started waking up theough the night on my side. So i started sleeping on my side using a v pillow to protect my boobs. I would say after at least a week when the majority of the swelling has gone and as long as you feel comfortable doing so. Give your nurse a call to check first tho x