Hope you are doing well. Sorry for your experience with Acrobat Reader Mobile.
As mentioned in the description above, since the file was not saved, it will be a challenge to recover the file. However, what we 'd suggest would be to check the Adobe Cloud Storage to see if the file is present there: https://acrobat.adobe.com/link/documents/
If the file isn't available there, I am afraid the file has to be created again.