okay so i have this spot in the middle of my boobs, and idk what it is. i at first i just thought it was like dry skin but now its like white. its like half a circle and then a couple dots around it, its not very big like smaller than a dime but idk what it is. i lay out alot and i used to go tanning and thats when it got worse. could it be like skin cancer or something? please help!