Arimidex/headache

Just started Arimidex and have been suffering from mild headaches, not unual for me, but these are also on either side of back of my head and neck. Also have clinical depression which is doing me in and feel unable to cope with anymore worrying is the cancer back although in the last month all my tests were good, tumor marker of 3, mammo on remaining breast good, all gyno tests good and I should be happy. But still wondering anyway if cancer is now in my brain. Shrink is trying different anti-dressants but I am tired of looking for the "perfect pill." Have had depression and obbsessive thoughts for 25 years and within the last month have become almost unbearable again. I am not sure I want to continue the fight. I am tired of it all. I wonder if anyone has gone through a post treatment, everything ok, depression or gotten headaches from Arimidex. Please help.