Stomach problem

I have been experiencing very slight pain on the left bottom side of my stomach from the last 1 year but the pain is not permenant ,instead it keeps coming and going intermittently(maybe it wont be there for a few weeks,then it comes all of asudden).The severity of the pain is very less and also i have noticed recently that this oain is accompanied by a very slight pain in the back (lower left side).I also feel a slight burning sensation after having food  from the last two weeks which too keeps coming and going.Please do advice me what this could be due to and how can i prevent this from ruining my life.Thanks in advance.