High heart rate. This something serious?

Hi, I'm on a medication for the past 2 years on tryptomer 10 mg and ciplar la 40, for the past 6 months my neurologist asked to change the medicine as I was not responding good on those and gave me tryptomer 25mg and dicorate er 500. these were for migraine and sensation in head. I'm feeling 75% better now wit these medicines and MRI was normal always. for the past 3-4 months I'm feeling fast heart rate resting rate 120 and met a cardiologist who asked for 3 tests ecg, echocardiography and volter. ecg shows sinus tachycardia volter shows high heart rate echo seems to be normal. attached the report, what could be the reason? are medicine tryptomer 25mg amd doctorate er 500 is the reason? I'm also having gerd for which i take some ayurvedic medicine. pfa reports and let me know is this something serious?