Is Anybody Else Emotional???

I'm trying to potty train my two YO and He Keeps Pooping In His Big Boy Underwear, I Told Him He'd Get A Whooping Everytime He Does, But I Don't Have The Heart To, He Pooped Again And I Just Lost It, I Cried Because I Feel Like I'm A. Bad Mother Because He Just Doesn't Get It, I'm 36 Weeks 5 Days, Is Anybody Else Emotional Over Small Things Like That