Over The Last 3-4 Weeks I Sometimes Noticed A Sensation

Over the last 3-4 weeks I sometimes noticed a sensation in my forehead near the hairline. Today, it could determine it was in sync with my heart beat. There is no pain. I took two aspirin and did not notice during the day, but tonight it seems to be an occasional sensation...not a heart beat, but similar to if someone was touching my forehead with their finger. Should I make a trip to my own doctor about this? I just had an exam with him 5 weels ago and he felt everything was OK... He has requesed some blood work with 12 hour fast that I need to do.