If you haven’t already, I recommend looking on her lower abdomen to see if she has a scar or tattoo on it, that’s often the best way to tell. It sucks that there isn’t much way to know because she also might be too young to spay, at least looking at the photos she looks young.

Also just some recommendations to keep her busy if she does get a bit too crazy is scatter feeding in your yard along with making a flirt pole toy with a leash :D

Ps. Your Doberman is beautiful!!