Should i allow my 3 wk old baby sleep alone in his cot and in his own room? Or should a caregiver sleep with him in the same room?

It depends on individual . I feel sleep training is not necessary so young so i prefer to sleep with my baby in the same room as me so that I can monitor him easily especially when the first few months there is higher risk of SIDS. It is also more convenient for me not to go to another room to check on him.