I purchased some pizza dough with a sell by date of 9/18/09 (bought it a week ago today and it's been refrigerated since). Today is the 21st and I was going to use it tonight. I see nothing on the bag that indicates an expiration date. Is it still good? I'm not much of a baker, so on the rare occasion when I make pizza at home, I purchase the dough from the store. Am i being paranoid, or is this still OK?