Should I follow up or sit tight?

[E equals MC2]

Phone interview last Friday (14th)
She told me I'll know if I'm in for next round this week.
Sent her a thank-you letter highlighting matching skills to the duties on Monday (17th)
Today is Thursday (20th)

Should I give her a call / email tomorrow (1 week) or Monday?

 

[clamum]

If you don't get a reply this week, Monday.

 

[Blieb]

Yeah, wait for Monday ...

Follow up expressing your continued interest in the position ... not that the ***** didn't call you yet