52 woman, Obesse, Once in awhile, resting, driving, I have a build-up feeling in my chest, and know what is coming, skipped heartbeat(s) then rapid beats that catch up. This creates some fear that I might be having a heartattack, but I feel fine afterwards. Today I had one and felt light headed off and on for two hour now, and have had a headache for about an hour now. There is a tiny bit of pressure in my chest. Should I be concerned? Today is a holiday, should I go to the Dr.'s tomorrow?