history: I did a walk-a-thon  last week was so happy I finished it before the walk I was un-assured I would finish but I did.  I did a walk a thon last week for back to school drive and needy kids it was s long walk but I finished it I felt so happy.  That sounds awesome_comma_ i bet you feel proud! Its nice to do things for kids who are in need.
current: I did before the walk I was un-assured I would finish but I did so I was overly proud and it was a great cause that raised lots of money. 
next: Of course! Dont let fear of not finishing stop you from doing anything!