I Have Pain In My Arm Off And On For

I have pain in my arm off and on for about 4 weeks. I had to quit bowling because it got worst
when I bowled. I went to the doctor and he put me in therapy I see no improvement. The pain
is worst while driving my car and using the compututer and at night trying to sleep. but it comes and goes
seems to be center around my elbow and moves up my arm. the best relief to walk around arm down
what is this? What can be done?