KNEE PAIN AND BULGING PAIN ON THE INSIDE OF LEG OPPOSITE KNEE

I,M 34 YEARS OLD AND FOR THE LAST 4 YEARS I'VE EXPERIENCED UNDER AND ON THE SIDES OF THE KNEE CAP BUT MOST ANNOYING IS THIS BULGING KIND OF PAIN ON THE BACKSIDE OF KNEE ON THE OPPOSITE SIDE OF MY KNEE, THIS PAIN FEELS LIKE SOME KIND OF TENDON,MUSCLE,OR SOMETHING IS JUST SWELLED UP AND OR NOTTED UP. PLEASE TELL ME WHAT THIS IS. ALSO I'VE HAD SOME EXPERIENCES WITH GOUT, COULD THIS BE ANOTHER FORM OF IT....