Would it be my best interest to request another stress test?

I had a thallium stress test done almost 2 years ago. It showed a shadow. The cardiologist is not worried. He said back then, I could get a heart cath or not. I did not nor have had any other tests. Should I be concerned? I am a 48 year old, thin female but have years of chronic sleep disorder/anxiety. I take cardizem and atenolol for heart palpitations that there is no cause for. Would it be my best interest to request another stress test?

Submitted by Chloe from Florida on 06/08/2014