Bleeding mole.

I've had this normal, round, brown mole on my shoulder blade since I was little. It's never bothered me. Never been raised. Completely normal. I woke up the other morning and blood was all over the bed. 😡. I was like wtf!? So of course I go to the mirror and check myself out all over. I found the mole on my back had opened and bled.  It bled the next day as well. Now it looks like half a mole and is much much lighter colored.