My son has concerning attributes

My son is turning 3 this week and as time goes by he is showing some concerning personality traits. We have a paediatrician appointment coming up in a couple of months (they’re hard to book). A few of the things I’m worried about

- strongly dislikes new people; hides away from them, hates when they give him any attention

- hates water on his head

- cannot go to the barber it’s a NIGHTMARE

- no toenail clipping until he’s asleep

- unable to share, everyone else gives up their toys so he can play with them as he goes crazy

These are just a few, there’s actually more. I wonder if anyone else has children with similar traits - what have they been diagnosed with?