I would suggest unwrapping him.. He is getting more distressed by not being able to move his arms freely I think.
Why does he have to keep a dummy in? Excuse my ignorance, Charlotte never had one, so I dont understand these things! lol
Also are the curtains closed the room seemed quite bright.
During the day sleeps at that age Charlotte used to sleep if I fed her on my bed. I didnt have other kids to worry about though, but perhaps you could try that? Does he feed to sleep at all? I found that so effective and Charlotte doesnt have to fall asleep feeding anymore, so it doesnt last forever!

Hope you find something that works for you hun! It can be so hard when they wont nap properly, it ends up affecting them all day, so hang in there, you are doing a n ace job