I am 58 years old, female, multiply handicapped and have cardiac, respiratory, and neuro-muscular issues. I have been treated with nitro-stat, nitro-dur, isorbide for chest pain. Lately, my blood pressure has been dropping, (I am treated for very high blood pressure) which my physician treats with IV fluids at home. Today I had a different type of chest pain - not squeezing, and not with very rapid heart rate, it felt like I was being stabbed with a sharp needle over and over again. I was very weak and slept most of the day. I am dizzy when I try to get up. Could I be having a heart attack? Please help. I can't stay at the computer because I am very dizzy.