sharp head pain above and behind right ear

Hi, can anyone give me a clue as to why I am suffering from sudden sharp head pain above and behind my right ear? It has only occurred in the last couple of days. The pain is coming often, sometimes several times a minute, its very sharp, makes me wince and catch my breath and is then gone. There is no warning and is worrying me. The area is beginning to feel bruised, without being poked about. Sometimes, the pain shoots into the neck down behind my ear. Generally I am in good health, I am of average weight, 36 yrs old and I smoke about 5-10 cigarettes per day. I have been quite tired recently and have noticed in the last couple of weeks some muscle and joint soreness and stiffness (iv'e put down to arthritic or rheumatic pain), especially in my hands, back and neck - not dehabillitating, but quite sore. I hope someone can put my mind at rest that none of these symptoms are connected and the sudden onset of these sharp headache pains is just stress or something similarly normal? Oh, and I do have a cough from a nasty cold with fluish type symptoms which I got in China at the end of August - the cough never completely cleared up, but I guess that is down to the smoking.... I know the answer to that one, but anyone who wants to tell me to stop, please feel free!! Maybe it will help push me into it...! thanks to anyone who can help with the headaches!