Bump on lower eyelid that doesn't go away - how can it be fixed? (Photo)

Hi, I had a big chalazion on my lower left eyelid that I got surgically removed more than 2 years ago. However, there's still a bump on my lid. And it has been there for over 2 years now. I can't remember if it was this big after I had the chalazion removed, but it was there. I'm so stressed because of this. I went to a doctor. She gave me drops for dry eyes, and an ointment called "Ocupol Dx". But it didn't help. Any idea what is it & how to fix it?