Newborn sleeping positions

Amanda
My 14 day old loves to sleep in my arms. Every chance i get i set him down. Whether it be in the swing, pack and play, or bassinet i try and do it after he falls asleep after a feeding (formula fed only) but lately hes been waking up after 1 hour in the bassinet. How can I change this? Or should i keep doing it and let him fuss or hold him? I kno hes tiny and loves the warmth of me but is holding him a long time while he sleeps (30-45 mins) harmful?