My 8 month old has started to whimper in her sleep. She never actually cries its the facial expressions and breathing that makes it look like shes about to burst into tears. She does this several times throughout the night too. Ive had a look on the web about nightmares but it says they don't usually start until 18 months. Anyone else experienced this? Shes recently cut her 2nd tooth and ive a feeling it won't be long for the next from all the finger chewing. I thought it could maybe be teething pain but it never seems to wake her up from her sleep? Any advice welcome 