Cindy,
My sympathies. I lost my dad 13 years ago, in somewhat similar circumstances.
My dad was a mailman, and had been assigned to a new route--everyone knew him on the old one. Long story short, he had a heart attack in his jeep and was there in the jeep for over an hour when one of the patrons called the post office to complain that she could see her mailman just sitting in his jeep and that he hasn't delivered her mail yet. They knew something was up and called an ambulance and the postmaster went out, too.
I sometimes wonder if my dad had been delivering his old route if he would have made it. He arrived at the hospital alive, but didn't make it.
Don't hold back those tears and remember all the happy times.
Suzanne