Welcome BB. Sorry you're having tough time... 11mo still sleeping badly sounds very depressing...
Cakeis that's annoying. I still remember DS sleeping exclusively on me for first 10 weeks of his life, day or night. I sometimes miss the closeness, but not too much 
Cake that is really a progress. I feed DS just before bedtime, but then I put him into his sleeping bag and into his crib, and he would usually wake up during that, but would still be quite calm and sleepy. Could this work for you? Sorry if you're already doing that!
DS's sleep is just so random, especially during the day. Yesterday he went 4.5h between waking up and his first nap. I hoped thought it would mean a long nap, but no, half an hour
Which was clearly not enough as he then slept on me after the feed...
I think he's trying to find a comfortable position to sleep, which is on his side, but he just can't turn on his side steadily enough so keeps rolling back onto his back... So after 40 mins of this settling and rolling back and crying I just put him onto my bed, wedged him in with duvet and he slept for 4 hours... Which is great but I'd rather he did that in his bed! Any ideas? The thing is that he is sitting brilliantly from 5 months but not really rolling yet - he just doesn't seem to be very interested. When he tries he'll sometimes get it, more often not, but he just doesn't really try to practise it.