How's it going OP? We're still having bad nights over here too. 3 hours sleep for me last night! Feeling dead on my feet as baby is EBF and is so far refusing to take a bottle so 4.5 months of doing all night wakes pretty much solo is taking its toll.
Teeth and wind are our main problems I think (DD's not mine
)
A few things we've tried in case it helps.... cranial osteopathy - took DD for an MOT as it worked wonders for her feeding issues when newborn. Nothing wrong with her, but confirmed teething (which I knew anyway) but good to have ruled out anything else.
Teething - have been using Anbesol gel which seems much better than bonjela/dentinox which I used to use with DS1 when he was going through it. They can have the gel from 4 months and the liquid from 5 months. Also using Ashton and Parsons powder when I remember.
Wind - I used to use Infacol but that just didn't seem to be doing anything, so have gone to gripe water. Bit more of a faff, especially if you feed to sleep like me, but boy has it been doing the job at getting the wind up! Much better! Don't think DD is too keen on the taste but it's working.
DD also seems to have Eczema so am trying to get that under control in case that's annoying her at night. She also had cradle cap which had lingered for a while and she used to scratch it when she got upset so I bought some Colief scalp oil (I know you can use olive oil etc but I'm at the desperate stage of chucking money at the problem!) which has worked a treat.
Sleep environment and temperature - I know they should sleep with you til 6 months due to SIDs risk, but DD was being woken up by us and creaky floorboards/DH going to work etc, so have moved her into her own room -she's 4.5 months. I think this has helped (if she's not suffering with anything else
) so I'm glad we did it and if we have a bad night and she's still sleeping in the morning, mentally I feel better being free to get up and not feeling like a prisoner having to stay in bed in case any noise I make wakes her! I've also just invested in a Gro Suit in case she gets cold arms (but haven't used it yet as only arrived yesterday!).
We've got a Ewan, which isn't a miracle worker, but helps her stay asleep for a bit. Was wondering about getting one of those with the cry sensor as I'm getting desperate!
I'm sure you've probably tried all of the above but thought I'd share in case any of it may potentially help or give you a glimmer of hope. You're not alone 
