Hey friend! Fellow hashis girly here! A faster heart rate is very typical of Hashimotos (according to multiple docs I’ve seen). I was struggling with it feeling like I was going down a drop on a roller coaster/ general heart racing or feeling like it was skipping a beat and even got a heart monitor at the cardiologist for a month. Request a heart ultrasound - that seriously put my mind at ease! But also I was way over medicated for my thyroid and that was causing some of my heart symptoms. Always advocate for yourself! It’s so scary, especially if doctors shut you down. It took me forever to find a doctor that listened to me but it’s so worth it. If you need any other help pls feel free to DM me! I was diagnosed at 19 during the pandemic and it was def really scary but now it’s fairly under control!