DS is 5mo. We were v lucky in early weeks as apart from a few hellish first nights home from hospital he relatively quickly started sleeping 3hr stints at a time at night (in co sleeper crib), then up to 4hrs, 5hrs, until around 2-3mo he was sleeping from around 10pm until 7-8am with generally only 1-2 wake ups to feed, quickly resettling. Naps ok too, and generally happy baby.
At age 4 months things started getting worse - first night wakes dramatically increased, then he started taking a long time to re-settle at night, then for the last few nights he's started refusing to go back in his crib after waking at night, so I've ended up bringing him into our bed, which means I can doze (assuming he sleeps) but sleep quality really poor. His naps are hard to come by and rarely more than 30mins (rocked or fed to sleep) and often on me. He is fed to sleep at night, although sometimes I manage to put him into his crib drowsy and shush him to sleep.
His bedtime for the last 6 weeks or so has been around 7.30 (as he started getting tired early evening around the time his nap problems started) with simple routine of clean nappy, pjs, story, sleeping bag, feed in darkened room, into bed. He normally goes to sleep ok initially although often needs resettling after 30 mins or so (sometimes more than once) then on a good night will have a slightly longer stretch of sleep (until 12/1), but other nights often wakes 2-hourly to start with, with wakes getting closer together further into the night, sometimes taking an hour or more to settle.
Feels like I've got a newborn all over again, except he doesn't nap in the day so I can't catch up, and needs entertaining when awake (which I feel too exhausted to do).
I'm aware this is probably normal but I feel like I'm cracking up and have spent much of this weekend in tears I'm so exhausted. DH took DS out for a walk this afternoon but I was just so wired I lay in bed wide awake until they got back. I also tried going to bed when DS did last night but despite being totally exhausted I didn't sleep until DH came to bed at 10, and then DS woke for a feed 30 mins later 
Not sure what I'm asking really and sorry for massive ramble but I guess any thoughts on the following would be really helpful:
- Anything I can do that I'm not already doing? DS is EBF and currently refusing bottles so DH can't help with feeds but I'm persevering with this. Not keen on leaving him to cry at this age.
- Those of you who went through this around 4mo... when did it start to get better? Aware it's poss just something I need to ride out
- I often see people on sleep threads advising co-sleeping to get through tough times. How does this work in practice?