Sleep postions

Anyone else’s 5-6 week old only sleep well on their stomachs? I know that back is best but she never settles so I tried her stomach and just like her big sister, she sleeps sooo well.

This evening, she slept 730-12 on her stomach. I stayed up to watch her but all I kept thinking was “I could have been sleeping ..” so my question is, have any of you allowed their babies to sleep on their stomachs? She has awesome head and neck control so I don’t worry about that.

Just a real tired mom over here!!!