I want you to know that I care. But you may be going to ER way too often. Do you have health anxiety? I'm suspecting. Do you have a general practitioner? That's the appropriate person to see at this point and to start seeing regularly. You were on a low dose or prozac and it was likely your anxiety still spiking causing the spike in heart rate.
I'm a long time blood pressure patient. It will get higher when stressed or anxious. So will my heart rate. It sounds like treating the anxiety is a good route to take. You have to expect side effects or feeling 'weird' for the first two to three weeks and the condition being treated (like anxiety) to not be fully addressed at the current dose until 6 weeks at which point, increasing the dose often happens since anxiety often takes more than a general starting dose. What most do with SSRI's who are sensitive or fighting extreme anxiety is to titrate up. So. You could start at 10 mg for a week and THEN go to 20 and you'd have less intense start up side effects.
So, I hope my being direct is okay. You've had a cardiac work up and two ER docs who are not finding you to have any cardiac issues. Anxiety can show itself squarely in our chest. It sure does mine and is extremely uncomfortable.
Do you exercise? What happens during exertion in exercise? Important to note this. A, it gives some cardiac info. But also, if you start exercising, you may find your anxiety decreases overall.
What are stress triggers for you? (besides health anxiety)?
Hello~I understand your fears and concerns. I have had the same issues and have gone to the ER so many times I have lost count and every darn time I do, they do the EKG, and blood work and all is "normal" I have had anxiety over this so many times, I still feel that they are missing something, but they say they aren't and that I have health anxiety. So, I am trying to work on it, but it is not easy. My GP has told me not to worry, but I still don't believe it. I want more tests like and Echo, but they say I don't need it, if I had one, I would have to pay and I can't afford one as it is over one thousand dollars. If they thought I needed it, it would be paid by the government as that is that how they do tests over here. I fight fear over those horrid things daily. Thankfully, m blood pressure is perfect as is the rate of my heart, it is just those horrid skips which sometimes can go off and on for days. I worse a seven day monitor, the results were good, no serious beats, but I didn't have the ones that can scare me. I had to pay for that as well as they said I didn't need it, but I wanted it for reassurance, sadly, it did not give me that as I did not have some of the "atrial runs" etc that I normally have.
I am a member of a heart forum here, you may want to post there as well, they do have some good thoughts and ideas.
I hope you feel better soon and the answers and help you need, worry about them is awful, and sadly, makes them worse, I know, but I still can't stop. I refuse to take any anti-anxiety drugs, they work opposite on me.