very small, hard, immovable lump on breast?

Hi all! I'm 18 and i noticed two week ago ish i had a very very small almost blueish lump on the top part of my left breast. I didn't think anything of it but I noticed it again now. It doesn't seem to have gotten any bigger. It almost feels like there's a small seed in my breast? Should I say it to my mother? ( i'm a bit of a hypochondriac and don't know if she'll think it's serious enough) 

 

edit- just looked at it from a different angle and it looks like an indent too? so it's a very small lump/ indent?