Chronic pain right side of the body.

Hi, I am having severe pain right side of the body below ribs,Its kind of a muscle catch.it makes me to walk slowly.some times pain is extremly severe.from last two months i have lost 10kg of my body.i will do daily 40 mins of thread mill.now i weigh 72 kg.generally in morning after wake up it feel like muscle has streched whole night.from last 2 years when ever pain is there i use to take etoshine tablets it is to releive the pain.now i cannot travel in auto every jump in road makes me worst pain.at present etoshine is not at all working. From 1 month back i started zerodal -th8 i use to take only if it is much severe.i felt it does work 1 to 2 hrs thats it occassianlay.feeling severe shoulder pain from last 2 days. In shower daily i have hot water on back and side of my body somewhat it releives pain for 1 hr.next week i am traveling abroad next week for 45 days.can some one please provide medication as temporary solution.once back i will diagonise the problem.