stomach problems

hey am new, ever since i had my daughter (whilst pregnant i developed a burning sensation to one side of my stomach which lasted the entire pregnancy,after which had gone away in the last two years(MY DAYGHTER IS 15) IT HAS RESURFACED,my january cycle was the worse- the same burning unbearable stomach pain it literally kept me up for most part of the night, again this month am experiencing the same thing with one aditional pain my right hand cramps the hand is stiff and painful, are these just mere period symtopm, am worried about my stomach after  the period my stomach stops but it comes two weeks before my cycle.