I've been having problems with DS's sleeping.
He was in our room til about 4 months when we finally got his cot & he started sleeping in DD2's room.
Things were ok. But nt for long, so I left the porta cot in our room & these days he is sleeping in that more. His teeth are playing up, so he's usually in the porta cot til the first time he wakes then our bed.
Have you tried to put him in the cot with some small soft toys to play with? I do this with Jesse. If he's having a good day he might winge for about 5 minutes then he's asleep. (winge/grizzle, not cry)
If he doesn't stop or he gets worse I'll get him.
I have to put him down on his belly. He won't sleep any other way any more.
Patting his bum works when he isn't aving tooth problems.
Sometimes I rock him in the pram (had to tonight), other times I have to feed him.
Sometimes if he's over tired all I can do is cuddle him or walk while he cries.