Why isn't fedex or USPS showing my order? ?

I ordered perfume last Thursday and on Friday I got an email saying ur perfume has shipped, so I take the tracking number and fedex says no record and then USPS says no record. It says 3-7 business days and it's been 3 days and it still has no record! I really need that perfume and I feel like it's not gonna come, any advice so I could stop freaking out? Please, and thanks in advance