Ahhhh. Well I will tell you something.. I developed what looked like a bruise on my left cheek, hi on the cheek bone on the out 1/3 of my eye. Also, what looked like a 4 petal flower on my forearm. I was concerned and asked my Doctor. She said that was what is referred to as "Estrogen Marks". She said that 95% of the time they will disappear over time. She said a lot of women get them confused for birthmarks but they don't usually appear till they are more than mid way through puberty.
So, maybe your freckle is the same???