Just a phase...

I am bottled, fizzy water and you are shaking me up.
You are a fingernail running down the chalkboard I thought I left in third grade.
Now my only consolation is that this could not last forever, even though you're singing and thinking how well you've got it made.
Who are you?
When will you be through?
Yeah, it's just a phase.
It will be over soon.