My white GSD sheds year around, but seriously blows coat at least once a year. I try to brush him outside and when he's shedding a lot, it looks like it snowed! Luckily, he enjoys being brushed, so it's not really that big of a deal. When he's shedding heavily, he's seems to be a little bit itchy, so I up the coconut oil a little and that takes care of it.
Sometimes during times of stress, a dog will shed a bit more than usual.
She's probably just being a typical "German Shedder", lol.