I sat down on the couch to rest for a little while and ended up falling asleep for a few hours. I was laying on my back the whole time but kind of propped up against the arm so not totally flat. I know your not supposed to ever sleep on your back and now I'm worried about baby. I am 16 weeks 2 days.

Edit: Thank you ladies for all your responses. I am a first time mom and so reading about everything we aren't supposed to do can be scary. It is encouraging to hear that it's okay and that my body will tell me when it's no longer safe. I don't normally sleep on my back in bed so it should be a problem later on.