Oh dear... lol! Been there too.
There's something so entrancing about new fabric on a bolt... in baskets... FQ... Charm Squares... cough.... and when you don't get to a shop very often... you're definitely not a bad person... I blame the fabric.
Although I did get the money together to pay off the card before the interest kicked in, I just told my DH, "I don't drink or smoke and never taken drugs... I have to have ONE VICE in my life!"
He just smiled, and the money I'd gotten together to pay the credit card... gave it me back and told me to go and get some more fabric!!
Wish I'd a known that before-hand... I might have spent a bit more lol!