Breast swollen. Areola large

Jasmine
I'm not quite sure what's going on with my body. Last night I went and got an airbrush tan and took a look in the mirror and noted that my left breast is visibly larger than my right and my areola is 25% larger. I'm not supposed to have my period for another 2 weeks so I have serious doubts that it's an early sign of pregnancy. Should I be concerned.