I have been experiencing sharp lancing pain behind my right ear in the mastoid area?

Hello I’m a sixty year old femail . I have been experiencing sharp lancing pain behind my right ear in the mastoid area for some months. My GP sent me for physio and I had six session and three sessions of acupuncture. Pilates was recommended. I had my first Pilates class yesterday, I had no pain during or later that day. This morning I awoke with the sharp pains and have experienced this all day , now I have the pain if I touch the area, I have not had this before. The pain is sharp shooting and very frightening. Thank you

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