My Father And Mother Both Have Had Heart Disease Issues.

My father and mother both have had heart disease issues. My father died of a heart attack and my mother has a pacemaker due to A-Fib. I recently have started having chest discomfort (not really a pain) but a burning or tenseness in my chest on the left side. Last night, I got really hot feeling, felt like the room was spinning and saw spots before me eyes. I didn't want to alarm anyone, so I got up and went to the bathroom and put cold water on my face and got a drink of cold water. It was an hour before I felt better. We were visiting a friend and she was explaining her surgery and I thought I might have gotten queezy listening to the details, but in all honesty, this has happened to me before, and I am scared that I have heart disease.. When I did the WebMD symptom checker, the Seek Medical Attention box came up 3 times.. Now I am really scared.. What do I do?? Our Emergency Room staff are not great - and so I fear going there and being Mis-Diagnosed..