Hi everyone. I'm new to Reddit, but I need to ask for advice. I'm 37 and have had anxiety for as long as I can remember. I'm an anxious person and worry about everything and anything. I see a therapist and aren't currently on any meds. 

I've had heart palpitations for a while. They're not severe---maybe a few a day. My GP said to see a cardiologist and I did because I needed to know what I was experiencing. I had an EKG done and bloodwork and everything was fine. However, I didn't have any palpitations during my EKG. 

The doc sent me on my way. Anyways, I guess I forgot to tell him that once I experienced something that wasn't palpitations. It lasted all of 5 seconds and felt like my heart was racing. I was sitting on th couch. Was i anxious? I mean, in theory, no. But I'm always anxious in the back of my mind. 

Two nights ago I was wide awake and had the flip flop sensation. It upset me because I hadn't felt it much since my visit with the cardiologist. I figured I had peace of mind seeing the doctor and that's why I didn't experience so many palpitations. That or I was just starting to tune them out. 

Anyways, it was 230 am and I was wide awake in bed, on the internet. I don't sleep well and I don't always drink enough water, for what it's worth. I felt the flip flop and it startled me. It got my racing thoughts going. A couple minutes later my heart started to race. I hadn't felt this in 6 months and this was only the second time I'd ever experienced this. I took a breath and it persisted. I got scared and sat up to wake my partner and it still continued, panicking me further. Then it stopped. At this point my heart was thudding from the adrenaline. 

If I had to guess, the whole thing lasted 10 seconds. I feel foolish for even posting this but now my anxiety is just wretched. 

I spoke with my cardiologist today and he wants me to wear a holter for 24 hours. But I know they don't catch everything. What if I wear it and it shows diddly squat? Does anyone have insight as to the difference between panic attacks and SVT or some other type of arrhythmia? I would visit my GP ad nauseum, as I'm a hypochondriac. Every time he'd listen to my heart he'd say there was no arrhythmia. However, I know things can crop up later in life. 

Do I push for more tests? Try to relax? Is this anxiety? SVT? Some other sort of arrhythmia? See a second cardiologist for another opinion? I feel like I live at the doctor. I have a specialist for every orifice, and they all tell me to get the hell home and stop worrying. 

I'm sorry for the novella. I truly appreciate any insight. I know arrhythmia can be tough to diagnose, like, is anxiety causing arrhythmia or vice versa. The cardiologist seemed to think whatever this is isn't serious, but now I'm a stress mess.