Crusty nipple? not pregnant? help??????

I am a sixteen year old girl on the pill, and I am not pregnant. I noticed today I had some crust on one of my nipples. The centers of some of it were darker, like scabs. I scraped them off and it still feels dry, but the other is normal.
There was an itty bitty but of blood. Like, small like almost not noticeable. But I think that was from me scratching.
I know google is just gonna tell me I have cancer, so please help.
I didn't notice and discharge, just the nasty scabby crusty stuff.

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