Turkey Tail fungi

Indy's back to herself. She doesn't eat much while I'm out of town, even though I have someone looking in on her so she knows she hasn't been abandoned. When I got back from Milwaukee, she went back to eating normally but then promptly threw up. After that, she was constantly asking to go outside to go to the bathroom and she went back to not eating. Came close to calling the vet but she still begged for treats and was bright eyed and eager to go for walks. It took a couple of days before she could finally stay inside for more than an hour and got her appetite back. After all of my precautions to not catch the flu this season, maybe she got a doggy version?