Have had a headache for about 2 weeks on the upper right side of my head. it is a pulsating feeling. ?

Migraine: I advise getting checked for migraine and medical treatment. See your physician-2 weeks is a red flag- call for an appintment now!

Several: Pulsation may be nothing unless it is associated with elevated blood pressure which you should check, or if the area is warm, or you can feel a ropey pulsating blood vessel, then that should be seen as soon as possible. A blood test called a sed-rate would be needed. Otherwise I would treat it as a muscle contraction headache that might respond to osteopathic manipulative treatment or chiropractic