i’m not sure what the advice is but i’m three weeks post op and still find it really uncomfortable to sleep on my back or side. i use my v pillow and sleep semi lay down, kinda got used to it now! gone are the days of sleeping in my ultimo bra cos i didnt like my boobs flopping to the side when i curled up on my side! miss sleeping on my side but dont miss floppy boobies! 
x