I have developed horrific headaches after installation of a dental implant? Dentist will not remove it.

I am a 38 year old female in good health. I got one dental implant installed in the back lower molar. A couple of weeks after installation I started suffering horrific headaches. Before the implant installation I rarely ever had headaches. The top of my head is pounding. I have pain that radiates down my neck and between my eyes. I can't sleep at night because my head is pounding. This occurs all day. I take headache medication to sleep but it eventually wears off and I wake up with headaches.