My 2.9 yrs dd has woken up crying inconsolably 3 times this week. Doesn't seem to be ill and isn't coming up with the normal requests / excuses but just cries for 30 mins despite cuddles, taking her out of her room etc. She's a great talker and can usually tell me what the problem is but tonight was confused and incoherent - though seemed to be awake. The interweb says nightmares and sleep terrors start later. Anyone had experience of similar?