DS is 14 weeks now and I'm still feeding or rocking him to sleep at night and for naps. He will happily drift off himself in the car or being walked in the pram (as long as we keep moving) but no chance at night or napping at home.
He was prescribed Ranitidine for silent reflux a month ago and his sleep intially improved loads, he was going for 4-5 hours then waking for a quick feed, then another 3hrs then a feed, then through till morning, about 11 hours in total and bliss for me. He was chilled in the day and napping well, 2hrs in the morning then another 2 or 3 shorter naps in the afternoon.
He's now only doing 3 hours for his first stretch at night then feeding, back down for 1 to 1.5hr stretches if I'm lucky after that, sometimes he just won't settle. He's thrashing his arms and legs madly (which wakes me immediately) in his sleep and will do this for 30mins or so before waking up distressed. He's always got his eyes closed whilst thrashing and looks like he's trying to stay asleep. I can gently hold his arms while patting and shushing, this will sometimes give him another hour but I have to keep doing it so I'm exhausted. I'm checking his dose for Ranitidine as he has put on weight incase it's the reflux again. His naps have gone to pot in the day too.
It seems to be that all the babies I know that sleep well or even through the night of a similar age can self settle themselves and are put down drowsy into their cribs, I'm assuming if they wake in the night they can drift off back to sleep again without help. I'm looking after DS singlehandedly and the last week or so has really started to get to me, I'm feeling pretty awful and down after having been so pleased his terrible new born sleep was improved so much with the reflux meds. I felt human again for a couple of weeks! HV advised putting him down into his next to me for naps and night sleep awake but drowsy so he learns to be independent but offered more advice than that! 
I'd really like to try to help to master this but have no idea how, he's too little for CC and I don't think I could do it anyhow! Any tips would be greatly appreciated. I'm aware he is rather close the the fabled 4 month sleep regression.
Sorry that turned out so long!