I'm A 64 Year Old Female With Pain In My

I'm a 64 year old female with pain in my back, right side, in my rib cage. I'm also experiencing shortness of breath and nausea. I have a history of heart disease and have a stent. I began walking 1 mile and 1/3 e
very morning three weeks ago. The pain began several days into the walking routine. This morning was the first time I was unable to walk because of the SOB.