Skin Cancer in a 4 year old!?

I have a four year old daughter, who has (what we thought) was a beauty spot on her cheek. A few months ago we notice a small blue bruise on her ear, we assumed she had knocked it and left it, but this morning (on a Sunday) I was brushing her hair and noticed this has changed, it has now gone almost 3d growing upwards into a point. it is still blue, but almost looks like it is infected, but its not. I asked my daughter to let me touch and after a battle she allowed me to touch it, it is hard to touch….
It is Sunday and no skin clinics are open. Does anyone have any insight one what it may be??? She is only four years old and we have been in Australia for two years.
I do not have my camera to take a picture unfortunately.
Thank you