What Causes Headache And Bump Along The Ridgepole Of The Skull?

Hi. I suffer from headaches, have for years. Over the course of the past 2 months, I ve had a headache, primarily on the left side of my head. It tends to be near the temple region. It tends to happen every single day. I did have several headache free days recently, and then developed a cold. The other day I was rubbing my temple because I ve felt pretty crappy (cold symptoms are finally going away) and noticed a painful bump on the ridge of my skull where it seems like 2 bones meet. It s above my left temple and more long than it is round. I m freaking out over this. I m uninsured, can t afford a doctor right now. It hurts more when I press on it then it does on its own. Any advice or help would be greatly appreciated!