My DS would only sleep with co-sleeping at 2m old, he stopped it himself at about 10m old. Before that, I think. And babies need feeding, not dummies, for months. I took DS to a paed recently and he said that waking twice a night was perfectly normal for a 15 month old. Very few babies sleep all the way through in the first year.

As for wind/reflux, it is painful. Do you burp him after every feed? Back-patting is very relaxing to a baby, even if you do that for a half-hour then he's happy! You may not be, but it does stop the wind and the crying.

Best of luck.