OP, is it STILL growing in size, or has it gone down? If it doesn't hurt, and doesn't have any liquids coming out of it, I really wouldn't worry TOO much about it. But, if it DOES start hurting or growing, or if you can move it around, I'd go to the dr.
*Elizabeth.
"Love of mine, someday you will die
But I'll be close behind
I'll follow you into the dark"
-DCFC