Help with back pain.?

ya as the name implies i have a random back pain issue. im just randomly laying down and hey guess what... my back starts to hurt so does anybody have any idea on how fix this like sleeping wrong, bad posture, improper diet etc... if you need to know where its in the upper back left of my right shoulder blade but right of my spine basically in between the blade and spine not really that bad sometimes get worse when i breathe in but hey id rather live without back pain rather than with so got any suggestions im all ears