Talk to General Physician on Feeling Pain In Ribs For 3 Years

AoA I am feeling the pain in my ribs for last 3 years but could not find the reason yet. I feel in the front of both ribs and below them. This pain started in the left rib and expanded into right as well. Intensity of the pain is low and sometimes little bit high. and occasionally feel it in the back of ribs. I feel it when I sit for long time and also feel while riding the bike. Sometimes little pain in my stomach as well. I never got any hit in my ribs. For few months I am also getting the pain in my right heel when I sleep at night and in the morning I cant walk for sometime but later it becomes normal and I also get some pain in my knees when I sit for some time. My pain problem is pain in ribs and checking by different doctors in this period but I could not find the reason yet behind it. Plz advise me further. Thanks