How can you tell if you are experiencing heart palpitation?

Having heart palpitations (feels like extra or skipped beat) for last two weeks straight everyday more than a few times a day. Never happened before. In the past only getting an occasional palpitation once in a blue moon. After first week of palpitations started getting chest pain or discomfort also in upper back ( like how it feels after your muscles hurt from exercise) and dwelling anxious from it all. EKG yesterday said it was normal except for slower heart rate (59 compared to last years EKG 60). Had a physical 3 months ago and everything seemed pretty normal. Doc suggested a chest X-ray eventually and Xanax. She thinks its anxiety or stress and I would have agreed with her normally only with the heart palpitations I don t feel like its that since I ve had a lot of past anxiety over the years but I ve never had these consistent palpitations and its pretty scary. I feel like the anxiety im experiencing now is just due to being scared about the palpitations and the fear and paranoia of something more serious? I m 36 5 1 103 lbs. normally healthy no history of heart disease in family.

I am 27 years old. I am a healthy eater, non-smoker, and I exercise regularly. I have had heart palpitations that started after taking a high dose of Dramamine (Dimenhydrinate). I noticed the palpitations and a racing heartbeat right after taking the pills. I was scared, but thought it would be fine in the morning. They never went away. That was three months ago. I can describe it as a skipped beat and then a really hard beat. Thump, thump thump....pause....THUMP. I can feel it in my neck and throat. It also disrupts my breathing rhythm. I have seen my general practitioner several times and have had an EKG and stress test. She told me I possibly have PVC s. She is convinced it is nothing to worry about, however, they are increasing in frequency (sometimes 5-6 a minute) and are very distracting (scary too). I get them randomly with an increase during exercise and the day after. My question is: Could taking this medication have permanently alter my heart function? If not, could it have made me more sensitive to my heart rhythm? I repeat, I have NEVER experienced this sensation before taking this medication. I realize heart palpitations can be benign, but why would they start after this one dose, and continue months later? I want to know if there is anything I can do to prevent this from happening, or reverse this effect. I don t understand a whole lot about heart function, and I am not getting a very thorough explanation about how this could happen from my doctor.