My flash drive wont load windows

Hi, I had window 10 installed on my Sandisk 128gb flash drive, closed my laptop, put it on sleep went to bed came back it wouldn’t load like normal, So I pulled it out, used the 9 seconds power off button. Then my flash wouldn’t boot up windows again. Connected to another laptop then got the error message saying format disk. Have my office work on it. Could loose my job… Pls anyone?