I Had A Huge Lump Under My Eyelid Come Up

I had a huge lump under my eyelid come up on Friday about nearly the size of a marble it was painful,worse than any sty. I went to a local gp,they first thought it was a sty,then examined it and said it was an infection or a bite. I was given antibiotics and eye drops. Now yesterday afternoon my eye felt as if it was swelling up again,after looking the lump has now grown a bit more but now is on the bottom and outside corner of my eye,painful, all around and near the lump isnt red,it's a dark brownish color..and is causing swelling to go down my cheek.