Hi I have been getting numbness in my left hand, my chest feels tight I feel clammy /sweaty and weak ,I have been checked at the hospital had ecg nothing shows up, the doctor said to me he could barley see my heart as my chest inside is all dark grey, this due to me being a smoker for over 30 years, about 6 months ago i had the same pain and could not move my arm, my doctor gave me some tablets i take one put it under my tongue and gradually feel better, but he says there does not seem to be any signs of angina, but angina runs in my family, what else could this be