Is it the evil 4 month sleep regression? Holly has been a mare to get to sleep since that age, she refuses to nap and it takes forever to get her to sleep at night. She used to STTN, now wakes up all the time. We found the following things helped - blackout blind (or tin foil on the window), feeding her to sleep, not hyping her up by giving her a bath etc at bedtime, movement (she usually falls asleep if I take her for a walk, and I also have a blackout blind for her pushchair), dummy, a little comfort blanket/toy. She goes nutso if she thinks we're trying to get her to sleep, so we have to think of ways to trick her. Also if she stays awake for more than 1.5 hours at a time she goes into meltdown, she gets overstimulated really easily. Or perhaps it's teething causing her a bit of pain? Hope something works soon x x