First of all, let me say, that I am sorry for your loss. I know it is very hard to lose a pet.
Second, I agree with Doug in that it sounds like a vet visit is in order if for no other reason than to start ruling things out.
My real reason for posting, however, is to build a little on what Doug was saying in the hopes of making this as much of a learning experience as possible.
Throughout the year there are many, many posts along the lines of my snake won't eat, what is wrong/what can I do? While I can appreciate that the forums are a great place to try to get help and that most people here provide helpful, rock solid answers, the one thing that none of us can do is see, feel, handle, observe the snake in question. Unfortunately, that can be key to assessing whether or not the situation is critical or a wait and see type situation.
Now, this is not a slam on anyone who comes here looking for help. Nor is it a slam on anyone who provides answers to the best of their ability. It is more a plea to have the forum be but one source of information, not the only source. Being able to determine when an animal is fasting as a part of its regular seasonal behavior pattern or whether it is sick is something that is learned with experience. Often times there are clues that can only be gained in the presence of the animal in question. My hope would be that, in addition to utilizing the forums, everyone try to find a local resource that can be utilized as well. One that can be visited, or visit you, to help with questions that may become critical situations. I recognize that this may be pie in the sky for some but I would encourage everyone to seek out someone close to them that may be able to help when they need it.
As I said, I am very sorry for your loss. Good luck with your other snakes.
Rob