Hi, our DD is 6 months old. Recently (she generally sleeps through the night now waking about 7AM for feed) she has just started an absolutely petrifying scream in her sleep, seemingly still asleep with eyes closed. It lasts around 2 minutes then she goes back to sleep! She can do it about 10 times a night, once an hour! Is this to be worried about? I can't see anything wrong with her. She's not hungry/wet/sick etc etc. It wakes me up and it's pretty upsetting 