sleep and vomit problem

I have a upper back pain (shoulder level) the moment I woke up this morning. I don't know why. Is it normal? AND I always have this kind na every night nagsusuka ako pero its all saliva with sour taste, ung parang ngsesecrete every time na mgduduwal ako. I can't sleep well pag di ko nagagawa yun. Ok lang ba yung ganon and sino may experience na same? TY