Honestly if it will make you feel better, other than a little stress, there is no harm in going to a vet.

It will be far easier to get her out and inspect during the day. I have some animals I wont open the drawer on unless I'm feeding or its before 5 haha.... cause my hand is not food. Then you just catch them when they are out of it and generally more docile. Take a look around the mouth and smell.

Unless you have crazy humidity or maybe the animal was unhealthy from the start it is unlikely there is any rotting since you say it has not been sitting constantly in it's water... but it would be on their belly or in/around their mouth if there was.

Just to be clear what you're describing doesn't sound out of the ordinary however.

And, if you HAVE to handle your snake it will be when she is unhappy about it so might as well get some practice. If you expect to get bit, have a glass of water nearby to pour over the head if it wont release(which I do when I'm taking eggs away). Also wash your hands VERY thoroughly the greatest danger in a bite is the snake picking something up from your skin. We carry staff around all over the place and reptiles have a low resistance to it.