Can i cuddle baby to sleep the whole night, or is it dangerous. Baby is 3 months old.

Avoid at all cost. Im a first time mum, my 1 month plus baby girl keep on crying when I put her to sleep at her cot. So I let her sleep between me and my husband, she instantly fall asleep. Then I woke to feed her, I see my husband back was on top of her face. He sleep so soundly without noticing it. I learn my lesson that never co sleep with her till she get older like 2years and above.