Add the chicken breast to the bottom of your slow cooker.
In a small bowl combine the honey, mustard, Worcestershire sauce, melted butter, garlic, oregano, salt, and pepper. Wait to add the heavy cream until the end of the cooking time.
Pour the honey mustard mixture over the chicken breasts.
Place the lid on the slow cooker. Cook on LOW for 6 hours.
When the cooking time is up, add the heavy cream.
Using 2 forks, shred the chicken right in the slow cooker. Stir until the cream and sauce have combined.