I wouldn't say it's normal, but remember that doesn't mean something is terribly wrong. Human bodies are weird and sometimes they do things for no real reason. If you are still worried, talk to your doctor about your worries and they may be able to suggest something else to look for or they may explain why it isn't something to stress about.

My cardiac Dr told me that your heart is an innocent bystander to everything else that happens in your life! Meaning stress from all sorts of things both good and bad affect your heart daily. It takes alit if punishment but every pain in the ge real area is not necessarily your heart itself.