I’m the one that makes your stomach ache.
The one that creeps up on you, when you make a mistake.
I’m always there, waiting for you, again, to break.
And I point it out, again and again, to see how much you can take.
My twin and I are a dream team for real!
We push you, hurt you again so you can never heal.
I hit you first, a sucker punch to the gut, your breath I steal.
My twin strike you again and again so your fate is sealed.
You can’t shake us up, we’ll be with you forever!
We’re a double combo, greatest team ever!
Who am I?