Um,if your baby is only 11 days old I really don't want to dishearten you, so I am somewhat reluctant to answer.
DS was a total nightmare, I must stress. Most babies aren't like this, and whilst being a very ballsy type who went back to work full time when he was 8 months old, I am also a bit of an attachment hippy when it comes to parenting (if you can believe that is possible).
OK, by about 6 weeks he had started to spread out the night feeds to every three hours or so, but he did have lots of dipping back to marathon feeding sessions. I was still BFing when he was 22 months and if he wanted a night feed I let him have one even then. But when I decided it was time to stop he very quickly (within a few nights) started sleeping through or nearly through.
I found, whilst it is tiring, the easiest thing was to let him feed whenever he wanted because then I could lie down and rest. Don't know what your MW has told you about sleeping with the baby in bed (probably not to, I expect, I tried to co-sleep with DS in the maternity ward and nearly caused a security incident) but I would heartily recommend it. Get DH off the sofa and in bed with both of you, it's good for you all.
There's lots of support here. Don't be afraid of PND. If you are feeling low seek help early - be honest with your MW/HV when they ask you how you are doing. It's nothing to be ashamed of. There are loads of threads here about it (I was fortunate and apart from a bit of "baby blues" for the first couple of weeks wasn't affected) and loads of women who can help.
You're doing a great job.