How to break a habit of sleeping on Mummy?

[airhostess]

Hi,
My DS is 20wks and has been poorly since his 3rd injections. He's slept on me for comfort for the past 2 weeks. A habit has been created at now he can't/won't sleep longer than an hour in his own cot.
I don't Rush straight in
I do wait until he's crying
I have put an item of my clothing in
He does have a dummy but can't put it back in and I feel causes more problems.

So suggestions please as I'm shattered and it's only going to get worse. :)

Is his cot in your room? If not, it maybe worthwhile moving him into your room, or moving it next to your bed, so if he does stir, just stroke his head to soothe him.

Sounds very similar to separation anxiety

I should add he's been to see a crainio, his cold is better now and hopefully turning a corner regarding him feeling better. I worry about letting him cry it out as recently we did a 45 min car journey. He was screaming so I stopped, got him out etc and in a nut shell he screamed the whole way and has no intention of stopping so I don't think that's going to do anything but stress us all out.

Really? Ok. I might move him back in now. He's on me. He looks frightened in his cot when I go to get him, his little arms look like they are shaking. He's my second DS too and I nailed the sleep thing with him. How long should I bring it back in for?

Oh dear, poor little lamb. DD is scared to be left alone at night so is still sleeping in our room at 12 months old.
IMO id do trial and error, see if you can get him sleeping properly in his cot next to you for a few nights, if he's settled and seems content, try and move him back into his own room.
Does he share with an older sibling? And is there a night light in the room? He could be a bit unsettled by the dark, and how quiet it is.