Ds is 15mths and has always been a terrible napper, but has gone to bed independantly, without any props, AP'ing or tears from a very early age.
When he was about 10mths old he had a very rough time with teething and a throat infection so to sooth him I gave him a dummy. He had this for about a month and then i took it away cold turkey as it was causing more problems than it was worth. The sleep issues immediately resolved themselves but ever since going to bed has been a battle.
This has now progressed into him screaming a blood curdling scream

everytime I put him down. He stops within seconds of me walking out the door, and will either chat/play till he goes to sleep or just goes straight to sleep.
It is just getting worse and worse and it is heartbreaking I don't think it is SA as he is such an independant wee thing and has no problems going to others or being left at day care 3 days a week.
He has a lovely that he is very attacthed to and that is always with him in bed.
I was wondering whether it is just him asserting himself and protesting about going to bed but it is at every nap and at nights now too. And the screaming is just horrible, anyone listening would think tha the child is being tormented
He has been on 1 nap a day for about a month now and it is the only time I can ever say that he has had a predicatable routine. He is a lot happier (wakes happy from naps

and all our NW'ings and EW'ings have stopped. We get a good solid 11.5-12.5hr night
his day goes
7am wake (sometimes he wakes earlier but if he is happy I leave him till 7 before I get him up)
12pm nap (usually anywhere from 1.25hrs-2hrs-is kind of a bit hit and miss)
7pm bed
We have set times as he has never had reliable cues, and this way his routine stays the same at daycare too, which incidently he sleeps better at than at home.
I hate putting him down cause it upsets me to hear him scream. I have tried staying with him till he goes to sleep but that just frustrates him as I won’t pick him up. With the expception of just leaving him for 1min crying when I walk out he has never been left to CIO.
There have been no changes to his room or cot and our winddown hasn’t changed either.
I just want my little man to be happy to go to bed again but I don’t know what the problem is so I don’t know how to fix it!! Does anyone have any advice???