Thank you for your reply. I have a baby bojorn carrier, I have been finding it is making my shoulders ache and I have had a couple of headaches. My DS is just over 5 kg.
I have just bought a HAB, waiting for it to be delivered, since I have heard the ppl on here rave about them.

I don't co-sleep as my DH is a smoker, though my DS will occasionally join us after 4am, on my side. My DH is also too deep a sleeper, his pillow get shuffled in my direction and he has elbowed me in his sleeep.

Thanks for your reassurance, you just hear so much from CHN and peaeds Dr about it being a bad habit.