Looking for some advice please, husband and I are at the end of our tether 
5 month old DS used to be a good sleeper until the 4 month regression hit. He now wakes at least 3 times a night but we can cope with that - the issue is trying to put him down at bedtime as he's constantly fighting sleep! We have had a consistent bedtime routine of change, massage and breastfeed in a dark, quiet room for weeks now. He used to fall asleep on the boob but this hardly ever happens now so husband walks around rocking him to get him to sleep. The problem is DS is now either crying and thrashing around in his arms or acting wide awake and babbling (despite the fact he's clearly tired) for hours upon end - yesterday this went on for over 2 hours. We're starting his bedtime routine as soon as he starts showing sleepy cues but maybe we're leaving it too late and he's becoming overtired? I try feeding him again when he starts getting upset to see if he's still hungry but he usually isn't. He is teething at the moment but even after Calpol on the bad nights he's still the same. We've tried white noise which doesn't seem to make a difference either.
Does anyone have any brilliant words of wisdom? It's exhausting and exasperating and we just end up getting stressed at each other 