Hi Sara, welcome. I'm sorry to hear that you're dealing with long term effects from COVID - so called longhaul COVID. Fatigue, brain fog, and shortness of breath are the most common side effects that people experience. As you can see from the posts by @spinto02 @mhugs @kpatterson @lsmorgan @grammad and @dw3, you're not alone in experiencing a racing heart as well. I hope they will return to share their experiences with you.

Sara, Have you consulted a doctor about your heart issues or been to a post-COVID care clinic?