5 y.o. is afraid of other kids, could use some advice

My daughter was always wary of other kids her age, which isn't necessarily irrational, as kids can be very obnoxious. We encouraged her to socialize whenever possible, but weren't pushy about it.A year ago she started going to a kindergarden. (Actually we also tried at age of 2, but that was brief.) The adaptation period was long, she was hanging out just with adults and avoided kids for several months. (This kindergarden is very liberal in this respect, they have several weirdo kids like that.)We also had a nanny during this period, so my daughter spent only 4-5 hours in the kindergarden, and the rest with the nanny.Several months ago it looked like adaptation is complete: she started going to classes, playing with kids, got several friends in there etc. It's not like she really liked the kindergarden, but at least could tolerate it.1.5 months ago we changed some stuff: We got rid of the nanny and my daughter started spending 8 hours in the kindergarden.Initially it worked great, as she could attend classes in the morning and hang out with kids some more.Then something went wrong. Not sure what exactly. One thing she complained about is some boy giving her extra attention; but the incident was over in a couple of days.Another thing is that she got cold and when recovering we allowed her to remain at home until lunch.From that things went progressively worse, first my daughter started whining about going to kindergarden in the morning, then she also started whining about going into kindergarden at all, throwing full tantrums etc.Then she also started throwing tantrums when going to arts classes (separate from the kindergarden), which she always liked.So, basically, she's really afraid join a group of kids, any group, even if they are busy with something else and aren't bothering her at all. But once in, she behaves well, plays with them, etc.To me this looks like social anxiety, I suffer from it myself, but not from age of 5...We consulted with a psychologist, but she didn't recognize any serious issue.Any tips? via /r/Parenting http://ift.tt/2g77uNF