Yeah, because it didn't save doesn't mean they were gone, it means you are saving in the wrong format.
Unless you closed out the project you still had the opportunity to save in another format.

Also, until you close, all audio work is still in the temp aduio directory as chunks of audio. Every take is there .. that's how the undo function works!

I do not work here, but the benefits are still awesome
Make your sound your own!