VB,

Laying on your side can exacerbate a dislocated rib. Ask your upper cervical chiro if he can check your back for ribs out of place. Laying on that rib will make the front end of the rib cause symptoms. Believe me, it sounds odd but I have lived with it. Got lots of heart tests because they thought the way the pain radiated up to my neck was heart related. My heart is strong in every way they can test it but I can still have these chest pains if I lay in the wrong position for too long.

I broke a rib in college that healed crooked so I have to be aware of that rib getting out of place. An overly aggressive chiro can upset that rib. My PT also has to be careful.