I'm 43 non smoker just worried about lung cancer with a 3 on sed blood test cbc test good x-ray was clear with chest pain is lung cancer a worry?

Are you: referring to the ESR(erythrocyte sedimentation rate)? A value of 3 mm/hr is normal. Even if it was elevated, the ESR is a very nonspecific indicator of inflammation and other pathology, and could be elevated for numerous reasons. You are relatively young and a non smoker, the chances that your pain is due to lung cancer are extremely miniscule.