children's python help?

[pretzelpython]

So I've had my (supposedly a yearling, not 100% sure) childrens python close to seven months now. She's been pretty chill, eats regularly, sheds regularly. All of a sudden she's become super defensive and almost panicky if that's a way to describe it in the last month. Any movement or noise she whips around gets super defensive. Today I grabbed her water dish to change it, and the moment I took it out, she raced over to the spot and was all defensive and almost seemed pissed I took her dish. she also bit me today for the first time in a long time, and that's not normal for her. Any ideas or suggestions?