Panics about motherhood

Does anyone else randomly start panicking about being a mom? My partner has 2 other kids so I know he's a good father but what about me? Sometimes I struggle with walking and not tripping over air 😂😑 then I make it even worse and compare my unborn baby to my puppy that destroys everything and finishes it by taking a shit in the house. If I can't even potty train a dog how the hell am I going to raise a small human?