Oh gosh. I don't think it's teeth because she's totally happy all day and at naps and Calpol doesn't make any difference. I suspect some of it is deveopmental because she's got so much going on, and suddenly understanding so much more. Today we're trying a slightly longer A time (4hrs) before bed. DH and I are off out to the theatre and for a meal so my mum is going to be dealing with bedtime, just hope it is OK!