I have found my (exhausted) people.
11.5 month old DS here, who once 12 weeks hit, gave up sleeping for longer than 2 hours, often much less.
We've been doing gradual retreat for his first sleep of the night in his cot for two months. It's very gradual and there is no retreating as I still need to sit next to him and pat at times, it has stopped him waking after 30 mins which is nice, and it feels less claustrophobic then constantly feeding to sleep. He now goes to sleep without feeding and if I'm really lucky he will do between 2 to 4 hours in the cot. If he wakes at 2hrs I can usually quickly lie him down again for another 2. I feed him after 4hrs then try to resettle in cot from awake. Then it is anyone's guess, 40mins an hour... then he cosleeps with me and will wake at least every 2hrs till 6ish.
Still feed to sleep for cot naps in the day, and shhhhhh don't tell anyone bit he has finally started linking two cycles at lunch so sometimes does 1.5hr then.
Of course the last two weeks have been hell on earth as he's cut at least two teeth and had a very nasty case of tonsillitis which resulted in 24 hours of absolutely no sleep whatsoever.
I'm verging on completely loosing my shit on a regular basis. Hate 'D'H as he's only once me helped overnight. Have shouted and been very short with DS in the middle of the night, I'm horrified with myself for this.
Most of my friends babies have slept through from 6 months or there abouts so I feel super crap and useless. I'd really wanted a sibling close to DS as I'm frightfully old but can't feasibly see how even the conception would be possible with the current night time arrangements. It's just utterly crap, I love DS more than anything and I just cope as I will do anything for him, but I'm really begining to resent the nights. I feel like I'm wishing his babyhood away just for some rest and I'm sure we'd have done so much more if he's slept better, we've not had a night away from home yet. I wouldn't change a single thing about him bit I would dearly love him to crack this sleeping lark. Hell, if be overjoyed if he could sleep in his cot with a couple of wakes over night, I don't expect miracles. Meh.
Rant over.... 
