Sleeping on stomach ?

I have been letting my baby fall asleep on my chest and I sometimes lay her down in a swing ( not turned on)

but I end up falling asleep so I wake up in the middle of the night and put her down or continue to lay her back on me if she cries. Every night is different.

I have heard it all from my family that it’s very dangerous but she’s 6 weeks old now and she doesn’t like the bassinet. The only way for me to get sleep is her on me. She wakes up every 3 hours for her bottle and has no trouble going back to sleep

I want to know what others do or any advice because I have been reading on SIDS and I really want her to be able to sleep in her crib on her back