Help my entire scene is missing

so I was working on a project for the past 2 weeks and it's been going great bit for some reason I opened it back up after only walking away from my computer for a couple hours and my scene is missing? Any fix?

so I was working on a project for the past 2 weeks and it's been going great bit for some reason I opened it back up after only walking away from my computer for a couple hours and my scene is missing? Any fix?