DS (17mo) has had a few tough weeks with teething, lots of night waking, night nursing etc. He's high needs at the best of times and when tired..eeech!! Well just as the last teeth were finishing coming through our bedtime routine suddenly stopped working. We've spent 8 months with a consistent routine and suddenly he's back to needing to be rocked and taking 2+ hrs to go to sleep and waking as soon as we put him down after hours of rocking!! And horrible early am crying spells that boob couldn't fix.
So I was chatting to my bro who was telling me about his sleepless nights due to a neck injury from snowboarding and the penny dropped - DS had taken a decent tumble around the time the sleep routine fell apart. I palpated his spine and he was out in 2 spots. So yesterday I took him to the chiropractor and last night it was like the nightmare never happened - dinner, bath, bed, sleep when his head hit the pillow. And no nightwakings! And today at naptime he was asleep before his head hit the pillow!! Hope this helps someone - kids fall down so often its easy to overlook this when searching for answers.
PS Be sure it is a good chiro with paediatric training - ask other mums, friends etc. I do massage and have worked for some quacks but a good one can work miracles!