When does everything start?

I got my interview 07/15, on 07/17 i got a message that i've been accepted and asked what day id like my physical and BAT test. i did my physical, paperwork, fingerprinting and anything along those lines on 07/21, on 07/22 i passed the BAT test and that was everything. when i went in on the first the sergeant told me that id get an email saying i was hired after everything went through and asked what day id like to be my first which would be this upcoming friday.

i haven't gotten an email yet and it's kind of freaking me out, like it's only been 3-4 days since my BAT test and physical but i don't know i'm just worried they decided not to hire me or something. it's the weekend so i know nothing would probably come through these next two days but idk man.

(cross posted)