question: Hello. I am 5' 11", 195 lbs. and 41 years. Over the last week I've been having what feels like mini-anxiety attacks. I get slightly light headed with a slight shortness of breath, and I can feel my heart flutter a little.  I also have what feels like a small knot on the right side of my chest.  Six months ago my 45 year old brother went to the emergency room and they found a blood clot in his leg and 2 in his lungs.  I made an appointment to see a cardiologist tomorrow, but I am wondering if I should go to the emergency room?