Sharp pain coming from my forehead.

I am 33 years old. I have had migraines since I was a teen. I was taking injections of Imitrex while on a high dose of Lexapro about 2 years ago. Once I gave myself the shot, I felt an intense "woosh" feeling in my body and head. The pain in my head went from bad to unbearable! Later I kept feeling my forehead thinking there was cold water dripping on it. I could feel it radiating in one small spot. I thought it would go away. It hasn't. Sometimes it feels like a knife cutting my head. It will throb. I rub that one small spot when I feel the pain. I have migraines. This is different. It's very localized. It feels like it's close to the skin. When I get stressed it throbs. My grandfather died of an aneurysm at 62, and my grandmother did at 36. It bothers me. Any info would be greatly appreciated.