Hello. i'm a 36 year old male with history of anxiety and pvcs. can't sleep. as soon as i doze off, i get sharp pain below sternum. what is this?

Not your heart: There are many causes of sharp chest discomfort and given your self recognized anxiety, you likely think the worst. Musculoskeletal causes are most likely, but gastrointestinal and pulmonary causes, as well as the protean manifestations of anxiety, can be th culprit. There are cardiac causes potentially, but much less likely. Set up an evaluation with your doctor. Some testing may be in order.

Anxiety: See your primary care doctor first to rule out medical issues, especially with pain in your sternum. If you are cleared medically try using the free anti anxiety app for up to date information, exercises and videos to reduce anxiety. Best.