I am a women, 5 6 , 48 yrs, 164 lbs. I have had heart palpations since my early 20 s and have always been told this is normal. Two EKG s that were normal. I have had occasional irregular heart rhythm for about three years now. Recently (about two months) I started working with a trainer to get in shape. I have not been able to complete a workout without feeling like my heart is going to jump out of my chest or getting physically ill, even though I have tried very hard to pace myself and usually do only about 1/2 of what the trainer is requesting. Now, for about a week, I feel like my heart is just working harder than normal, full time, and my lower jaw and teeth are aching. I was seeing a Holistic doc a couple years ago, but have not been able to afford to continue since he doesn t take insurance. Is all of this normal for my age and/or current physical condition? Or, do I need to worry more? I do not currently have a regular doctor.