Natural Health: Could my four daily cups of coffee be the cause of my headaches?

Coffee beans are rich in antioxidants, can boost short-term memory and increase reaction times, help with exercise and sports performance and recovery, and improve fat breakdown. Too much of a good thing can be harmful, though — more than four cups of coffee daily can lead to irritability, nervous tension, and anxiety

Megan Sheppard: "Since you are experiencing headaches without having made any changes in your diet or lifestyle, you may have developed a sensitivity to caffeine. One of the most common triggers for sudden dietary sensitivities is the bacterium Helicobacter pylori (H. pylori)."

I'm in my 30s and have started to get frequent headaches, usually throbbing ones that take hours to ease. My diet hasn't changed, and while my work can be stressful at times, nothing out of the ordinary has happened. I drink four cups of coffee a day. Could this be the culprit?