The other night I woke up at 5am with tightness in my chest.  My left arm was numb.  The tightness released and I felt like I was going to black out, but fought to keep eyes open.  It happened a total of 3 times. Also felt something like nausea, but not quite the same.  Ive never had anything like that happen before.  I have had acid reflux, it was nothing like that.  Any ideas?
Hi and thank you for choosing Chat Doctor to share your concern. I read carefully your question and from the characteristics that you describe, in my opinion your chest pain it looks like a cardiac chest pain. If I was your treating doctor I would suggest doing an ECG, Graded exercise stress testing alone and in conjunction with echocardiography to exclude cardiac causes and a chest x-ray to exclude chest pain associated with the respiratory system. Hope my opinion can be helpful. Kind regards Chat Doctor.