Talk to Neuro Physician on Throbbing Pain Inside Left Half Of Head

Hi, Yesterday I felt queer pain inside left part of my head. It felt like a wave of pain suddenly occurs into the left side and disappears in no time. It happened many times between 8 PM to 1 AM. Then I fell asleep. And now writing this post I feel same pain but it's lighter than yesterday's pain. I work as a Consultant in a Chartered Accountants firm in Islamabad and that's why I sit in front of computer for hours daily. Also, I have to receive a lot of phone calls everyday. Further, I'm not overweight and eyesight is a bit weaker but I'm not wearing glasses nowadays. I want to know if it's some serious problem or it's only a result of my unhealthy routine? If it may be a serious problem then where should I go for medical examination.