Spot on breast

Hello, as I was getting dressed this morning I noticed a spot on my breast. It's yellowish and I scratched at it which made it all red. It is raised and fairly small. I have had my breasts checked on January but this spot is new. It's nothing I've seen before. Attached photo. I realize it might be from my bra but it's just strange. It is sore. 

I hope you're better now. It doesn't seem problematic but I would go to the doctor.