Six month old has been really upset and not herself the last few days. She isn't looking at us as much, smiling etc. I'm really worried about her but I did notice a sharp gum and wondered if it could be teething that's causing her to withdraw like this? Doctor didn't seem worried but basically only seemed to check for infection. I know autism can't be diagnosed at this age but I can't help my mind worrying over that. Of course she is loved either way but it would be devastating to see her lose skills. She is normally such a social, smiling baby with a beaming smile for everyone, and I feel like I've lost her!