Im a 18 year old female. I'm worried about a mole i've got on my back. i've had the mole for as long as i can remember however i've realised its two colours. it has always been raised off of my skin. i'm not sure if it has always been two colours but i've just noticed. i don't use sunbeds. i always use sun cream. i'm dark blonde with fair skin. i live in yorkshire so it's rarely extremely sunny and i'm always covered up. there's no history of cancer in my mums side of the family. my grandma from my dads side had breast cancer but was cured and has been okay for decades now. am i worrying too much?