My Barrett hasn’t changed to cancer snd I pray it doesn’t. How I noticed something was chest and breast pain. The doctors did every chest pain test possible and all was good. All this started after I started talking an osteoporosis pill once a month. I continued to mention to doctors that medicine caused me to belch and gave me indigestion. I was advised the good out ways the bad with this drug. Long story short I was so uncomfortable my gastro doctor performed an upper GI snd found Barrett. My point is I believe we miss symptoms thinking it is something else I wish my cardiologist had said to me your heart is good it may be time to see a gastro doctor.