I've noticed when I'm lying down that I can really feel my heartbeat in my left chest and sometimes even in other parts of my body. I've already had an ECG, echo, and TMT, and they all came back normal. My anxiety has been under control, but this is still happening. Could it be something else or is this just something normal?

can be due to benign causes such as heightened awareness of your heartbeat (palpitations) or muscle twitching. This can be exacerbated by anxiety. To help alleviate these symptoms, you can try taking a beta-blocker medication like Metoprolol (25-50mg) once daily to reduce the sensation of palpitations. Additionally, practicing relaxation techniques such as deep breathing exercises or yoga can also be beneficial in managing these symptoms.