Going through temporary personality/behavior changes, once in a while, is probably normal. Whenever one of my igs did something similar, I always took them to a good herp vet, and more times than not, the vet found a medical explanation.
There is the Monster-In-the-Window (the ig sees a cat or dog) problem. This could have happened to your ig. They normally get over it in one to ten days, but some nev3er do get over it (very rare).