I HAVE LIGHTED AREAS NEAR THE LUNG, AND HAD TWO

I HAVE LIGHTED AREAS NEAR THE LUNG, AND HAD TWO NODULES REMOVED FROM THE LUNG AREA, I AM TAKING ANASTROZOL SINCE FEBRUARY OF 2018, I HAVE TO GO FOR ANOTHER PET SCAN IN JUNE. I FEEL GOOD NO SIDE EFFECTS, I'M JUST WORRIED IF THIS MEDICATION IS GOING TO HELP ME.