When does cramping stop?

Whitney • First time mommy! Teacher. Christian. Arkansan.
I'm 7 weeks & I don't cramp every day. Just sometimes. It's never painful just mildly..cramps lol
I've never bled. I'm just wondering when cramping should be a concern? Or is it normal throughout pregnancy
This is obviously my first & I have no idea what to expect! 
Thanks in advance! 

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