First of all, If you have the problem and please calm down and dont worry.
Second, Normally it will take 8 days to update the tracking, when you got the tracking number.
Third, When you go to USPS to check it and the status is "USPS Currently Awaiting Package" and it proves that the package
is on the road between China and USA. So when the status is "On Its Way to USPS" and it proves that your package is on the road
between USA and your home. The last status is that show the delivery time and you should pay attention for it. Enjoy it :D