Em                  C
Im about to lose my mind
                         D
you've been gone for so long
                    Bm
I'm running out of time
           C
I need a doctor
            Am
call me a doctor
          B7
I need a doctor, doctor
                    Em
to bring me back to life        


can also play this pattern:
Am..F..G..E..
F..Dm..E7..Am..