Bruise on my leg?

So, about two years ago I slammed my thigh against the corner of a table and ended up with this bruise... but what’s actually driving me crazy is that the damn thing still hasn't faded away. It kind of recedes sometimes, only to pop right back up again, and honestly, while I was vacationing at the beach recently, I was too embarrassed to even wear a swimsuit because of it. I'm at a loss here—should I finally just bite the bullet and see a doctor, or is there some magic cream that might actually fix this...