Don't panic! You are not alone! Both of my boys (who are now 3 and 6) had this issue. I had to get occupational therapy for both of them when they were about as old as your daughter. My oldest (who has other issues, too...low muscle tone, high-functioning autism, etc) took longer to get the hang of it, but he now eats like a normal 6 year old. There are foods he still gags with (bananas coming to mind), but other than that he eats very well. My youngest had the same issues and he also couldn't sip from a cup. I started occupational therapy for him when he was 12 months old and by the time he was 15 months we were done with therapy and he never had another problem! Tell your doctor about it and good luck!! It's not so bad once you know what the issue is. Your daughter probably has poor muscle control in her tongue and mouth. Don't be scared that it is autism (I know all the talk about autism in these posts may scare you). My 3 year old is a walking, talking, eating example that not all feeding issues are due to autism.