Craig
I wouldn't worry too much about your Stimsons lack of appetite, I have had many snakes over the years that have gone through periods of voluntary fasting, one of my Royal (Ball ) Pythons refused to eat for seven months before continuing to feed with no ill effects, I also had an adult Jungle carpet that would cease feeding each year at the start of her cooling off period.
One thing that did stop one of my Boas from feeding was retained Brill scales, something I didn't check after one of her sloughs, I didn't notice that they had been retained for about six weeks, as soon as they were removed she fed with 10 minutes.
If it was my snake I would continue to offer food at regular intervals, try placing the food in her hide etc, I wouldn't be too concerned at the moment provided she wasn't showing signs of weight loss or loss of overall condition.
Hope these comments are of some use
Regards
Lee