Can Zoloft Cause Odd Pulses And Missed Heartbeats?

I am a 46 year old very obese woman. Blood pressure is good and cholesterol good. I do have slightly raised sugars and my insulin level is 14. I keep sweating excessively when i move around. This sweating stops when I am stationary. I also keep having a weird sensation in my chest. When I feel this weird sensation I feel my pulse and always my heartbeat seems to be either missing an odd beat and then a couple of quick beats. It gives me a feeling that I need to rub my chest and burp. I also seem to get reflux at this time. Every time I feel this sensation in my chest I guarantee that I can feel odd pulses. I did have a stress test a couple of years ago and it was noted I was unfit but also that I had a mild electrical problem on my right side which was apparently no cause for concern and no further monitoring required. I only take one medication which is 25mg of Zoloft once per day. i read that Zoloft can cause excess sweating but when I asked my doctor he said it would have happened immediately when I started taking the medication a couple of years ago. My mother has a leaky mytral valve and both my mother and two siblings both have an under active thyroid. I have been tested numerous times and my doctor states that my levels are normal.