Sorry to butt into your forum, but I'm so sorry to hear that Hootie!!
About a week ago, one of my Bettas died too! I had a total of 3 bettas-- all with different personalities. The one with least amount of "social skills" died. lol. He always swam away when people came near his bowl
Where did you buy him?? I week is too short of a time to buy a fish and it dying on you the following week!