So we have a dummy problem and self settling problem with my 23wk old DS that has been going on for 8 weeks now 
With the dummy, he usually settles himself to sleep pretty well, but 8 wks ago I started finding myself replacing the dummy around ten times a night. I usually ended up caving around 3am and brought him in with me. DH has been on the sofa every night since and I don't sleep properly once DS is with me.
We started holding him to sleep, pulling out the dummy just before he fell asleep about 2 wks ago (thinking we'd tackle the dummy association first then the holding) which worked beautifully for a while with him not waking til 2/3 however that ended about a week ago and he's now wide awake in the middle of night and won't go back to sleep.
So I figured we had a self settling problem too and started trying to put him down awake, then taking the dummy out however that fails spectacularly every time as it just wakes him up again. It just won't work at all. I was trying this for an hour the other night and ended up holding him again.
Last night I held him to sleep with no probs but he woke at half eleven and I spent the next 2 hours trying variations of holding him and leaving him in his cot, pulling out the dummy and but no sooner was I in bed than he's crying again. I tried bringing him in with me until he was asleep and putting him back in his cot with the same result.
So I don't really know what to do anymore. Leaving the dummy in gets him to sleep but means multiple trips for dummy replacement, holding/pulling out doesn't stop the night waking, and putting down awake and pulling out doesn't work at all.
He's been in his own room for month now and I don't think he's woken up in there the following day! !
We've been using a Sleepytot for about a month now before anyone recommends it - complete waste of money as he plays with it and ends up pulling the dummy out every time. It hasn't helped at all. I've also got No Cry Sleep solution which I'm using but not sure what issue to tackle first 
Any help would be appreciated. .at the moment DH and I are really struggling to cope and wondering why we thought having a baby was a good idea
