Hello well it's quite possible that you are facing muscular spasm... suggest you to use any analgesic spray for the time being... it's better you consult an orthopaedician and get yourself examined to r ule out causes related to spine or postural problems... It also seems like you are suffering from gastritis for which I will suggest you to avoid spicy and oily food and have more of home cooked food...yiu can also take pan tablet 40mg once  I a day half an hour before food for 10 days..thank you