One of my earliest memories of reading a news article in print was a story about a woman who gave birth to a frog. Except she hadn't given birth to it she'd gone swimming in a pond and, in my memory at least, some spawn attached itself to her—a horror she discovered when a trip to the bathroom resulted in a tadpole in the bowl.
1：
Except she hadn't given birth to it she'd gone swimming in a pond and，
这一句中间的it和she'd中间是省略了什么吗？结构感觉很奇怪。
2：
in my memory at least为插入语吗？
3：
a horror she discovered when a trip to the bathroom resulted in a tadpole in the bowl.
这句子的结构应该如何理解？
主语：a horror she discovered
谓语：resulted in
宾语：a tadpole
定语：in the bowl
状语：when a trip to the bathroom
是这样吗？
谢谢解答🙏