Chances the pain in both legs is caused by dvt? Had 2 negative d dimers & clear chest xray in december and have had pain in legs & chest for 2 months

Risk is. Very low given that you don't have risk factors for DVT (hospital or nursing home confinement, surgery, trauma, malignant neoplasm, chemotherapy, neurologic disease with paresis, central venous catheter or pacemaker, varicose veins, superficial vein thrombosis, prior dvt, etc.).