I've just turned 26 and recently I have noticed when looking in the bathroom mirror there is a line like indent in my right breast. I've never noticed it before so I believe this is something new. (Not a clothes indent as have seen it for the last 4 days)

when I look down I can't see the indent or feel anything unusual, and I even asked my partner to look as thought I was going crazy and he couldn't see it. But when looking in the mirror I efinately notice something?

has anyone else experienced this? I'm not sure whether to be cautious of this? I just can't feel anything unusual so unsure what the GP can do?