Help!

So my daughter has had this on her foot for about 2-3 wks now, doesn’t complain of it hurting. But I’m concerned due to the discoloration of it. Our Dermotolgist is booked up until January and I’ve googled what it could be and have completely freaked myself out! Now she does wear high top chucks (they’re her fave) but she doesn’t wear them to tight!? She doesn’t play sports, and she’s very girlie so she doesn’t horse around or play rough.

has anybody else went through this with any of their children?! If so please comment! I’d greatly appreciate it. This is located on top of her ankle.