Translation disappeared on Trados 2019

Hello there,

I completed a translation on Trados 2019 (SDL Trados Studio 2019 SR2 - 15.2.7.2849) yesterday with the intention of re-reading it today and delivering the package tomorrow. I noticed today that the project had disappeared from the list. I didn't worry at first, as it happened before and when I re-open the package everything is usually the way I left it or the translation I did "self-loads" when I click on the single segments. However nothing happens this time. Please don't tell me I have lost all my work and I have to re-do it all again for tomorrow!

Thank you for any help in advance,

Rebecca