16 month old won't sleep!

Shannon

So 2 weeks ago, my son had a week of being really unwell and got really clingy to me and wouldn't nap alone (I put it down to him being sick so I let it slide and let him take his naps on me for that week)

Fast forward to now, he won't nap in the day unless cuddling someone (he goes to a childminder all day every day and she has other children to care for so my son can't just take a 2 hour nap on her! So he has been going without one and its not good!) I don't know what to do to make him nap in his cot again, he just screams and screams continuously when he is in it. 1 minute after picking him up he is fast asleep in my arms, but if I try to put him down the endless screaming starts again.

His room is pitch black and we use a white noise machine.

He is struggling to go down at night as well - used to go to bed 6:30pm until 6am but now he is sleeping more like 9pm-5am (sleeping in cot at night).

Anyone else been through this? Please help 😭