How to find a lost un posted invoice that I lost and can no longer find

Hello everyone, 

i was working on invoicing yesterday and i lost one of my biggest invoice and didn’t get to register/post it and now I can’t find it

this is what I did. 
I went to Invoices and made a batch with all of the invoices then clicked on enter  invoices just to check what I had selected and noticed I had selected one of my invoices that I could not register and post yet so I click on the “X” and from there I haven’t been able to find it 

I also do that I removed an invoice from my selected batches and I find back in the Invoices section( in voices that I have not yet posted) but this one I can’t find anyone can please help

the Invoice that I lost was not posted/ registed it happened before I could