Help, I am being chased by a bear!!

This is how I have always felt, but then a friend of mine ran in the Gibson Guitar 5k and gave me the courage to try.  I am attempting the Couch to 5K program.  It's not that I want to be a super model, although it would be nice, but I really want to get strong and build up my stamina.  I want to go to Labor & Delivery down 2 flights of stairs without needing the oxygen mask.  I want to come up 1 flight of stairs from the Cafe Bacteria without being embarrassed because I am breathing so heavily.  This is my goal!