Lost weeks worth of progress

I logged into my account tonight and I’ve lost a weeks worth of progress. I finished every bloody harvest challenge, beat the guardian takedown for the first time and farmed a bunch of guns and it’s all gone.
The game rolled me back to last week and I don’t know what to do.
Any help or suggestions would be extremely helpful.

Could it have anything to do with Cloud Saves? Like, were you playing offline a bunch or did you maybe play the game on a different device?