I was surprised by her words,which made me recognize what stupid mistakes I had made.
我对她的话很吃惊,它迫使我承认我犯了多么愚蠢的错误我对她的话很吃惊,它迫使我承认我犯了多么愚蠢的错误
I was surprised by her words,which made me recognize_that_I had made.
what a stupid mistake
or
what stupid mistakes
the mistakes