Wondering if I should to ER/Urgent Care to get faster results

I’ve been having symptoms for about a year now and been to the cardiologist twice. First time she gave a 3 day holtor and an echo an EKG, and they came back fine. My symptoms and tachycardia got worse so I went back not too long ago and she gave me a 14- day holtor but when the results came in they said it was abnormal but also lost half the data. Then my doctor called me for results and said it was fine and schedules a follow up a few months later. I feel like I keep waiting and being patient and not getting anywhere. I’m wondering if I should go in the ER next time I have a bad episode and see if they can give me second opinions and help diagnose me.