How can i convince my Doctor to send me over to the hospital to have a chunk of glass removed? (from my head)?

I was in a car wreck some 14 years ago… bits of glass eventually came out from above my left eye brow… i believe there is still a square of windscreen glass lodged in my head, sometimes it feels like it is finally going to split to reveal the glass.

Anyway i want to have it removed as there is a pronounced bump… A few years ago i asked the Doc about this, but she would not send me for an x-ray or take the matter any further. i will not attempt to remove the glass myself.. so how can i convince the doctor otherwise?

Thanks for any useful answers 🙂