I am a 55 yo African American woman with normal to low blood pressure (90/47 to 106/50) with a history of two unruptured cerebral anuerysms (one coiled to prevent rupture) and history of demyelinating neuropathy in my arms and legs due to an autoimmune disorder, currently having very slight squeezing/pressure in my chest, mild palpitations, and at times sharp pain near collar bone, neck, shoulder and jaw. Occassional and brief periods of dizziness/light headedness. EKG and enzyme tests were normal at ER a few days ago. Symptoms still come and go.