What Is The Treatment For Indigestion,back Pain,pain And Stiffness In The Legs Along With Shortness Of Breath?

I have been experiencing my knees swelling on and off for about a year, started with one now both, the swelling goes down the front of the leg, my legs are very stiff does not go down even after rest, there s pain on the side of my knees the bone feels like a bruise if I press it and discomfort if I sit crossed leg and pain and stiffness when I try to straighten my legs after sitting crossed leg. it stays like this for a week or two, goes away for a while then out of no where returns a little worse everytime. This time round I have been feeling like I have indigestion burn in my chest, lower back pain, and a little very little short of breath even though I am lying down and had no physical activity..maybe you can help...the legs are tight behind my knee.