It hurts when i breath in, shallow and normal breaths hurt my lower right shoulder?

Requires exam: and probable chest x-ray. Call now or go directly to your local urgent care clinic.

I suspect : a lung problem that involves the chest lining or pleura near the diaphragm (muscle that aids inspiration/expiration). Diaphragm inflammation pain is often "referred" to the upper chest or shoulder. You might have pneumonia, bronchitis resulting in pleurisy or even a pulmonary embolus/blood clot. This deserves evaluation by your doctor..go in or make appointment today. Good wishes:)