does anybody else deal with this?

Kassie • I'm Kass, me and my husband are expecting out firstborn son in May 2016. We love our little Nash Reagan Garcia 😘
 I've exclusively breastfed my four month old son since he was born. In the beginning I didn't notice this bit now I do. My left boob is almost twice the size of the right. My son just ate. I'm not engorged on that side. Is this fixable or will I need some sort of boobjob one day to correct it?