For the first 2 weeks I slept in my recliner chair or in bed but sitting down 90 degrees with lots of pillows behind my back and neck to support me in that 90 degrees position, then i moved to sleeping on my back because before that i would suffocate from my chest pressure but everyone is different when it comes to that, my doctor told me i can sleep on my side from week 1 but i am now 4wpo and i still dont feel comfortable at all sleeping on my side. Your body will guide you to the comfortable position it just takes a few trials, you’re ok to sleep in whatever position you like as long as it’s not on your abdomen