I am having back pains on the left side near my rib cage . When I lean to the left it feels like something inside is being squished and painful...I have systemic Lupus , diabetes, and Asthma . Some of the pain radiated toward the shoulder. I have been on the heating pad all day...When I ask friends, the response is maybe a pulled muscle, maybe kidneys, maybe Pancreas, maybe your lung. Is there any thing you can advise? Please disregard my request. I am living on limited income. Thank you anyway...