Hey recently I've been experiencing an odd symptoms usually at night but it happened in the day rarely (when I wake up). It usually begins with a buzzing in my chest which prompts me to begin to feel my heartbeat. And I can physically feel my heartbeat begin beating erratically and fast and then stop, this usually prompts me to feel my chest. This is accompanied by muscle spasms on my leg stomach etc. What do you guys think anxiety or an actual issue.