Hello and thank you for your question.
Pain which is associated with breathing in, as you described, is most likely musculoskeletal. It either comes from a pulled or inflamed muscle and is not related to your heart.
It is possible that you slept wrong on the shoulder or lifted something heavy that you did not realize at the time and now the muscle is inflamed.
You can use ice pack 3-4x per day for about 10 minutes at a time and take Advil/Aleve to help with pain. Your pain should resolve in 3-4 days, maybe sooner. But I can reassure you that it is not related to your heart.
I hope you find this information helpful. Please feel free to follow-up with any other questions you might have.
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Best wishes and good luck,
Yes, based on what you are describing it sounds more related to anxiety then anything else.
Anytime you have pain that is associated with taking a deep breath, turning, pushing on it, it is related to a musculoskeletal source rather then your heart. You should not worry about it because anxiety will make your symptoms worse (shortness of breath).
Hope this helps. Let me know if you have other questions.
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