Blank screen with mouse curser after signing in

Windows 10, Dell XPS 13 (around half-a year using it; from dell's website) Believe this is due to a the 'bad/long' shutdown screen (that actually made it go to sleep instead)

Please know before this, I had a very long shutdown screen, after I pressed cancel (other option Shutdown anyway) when some app was still running and asked if I wanted to quit and save before shutdown.

I went for a walk, when I came back I pressed the power button and the lock screen was shown (it was sleeping I suppose) without shutting down or restarting I just signed in, and then presented with a black screen with only my mouse cursor. [will have picture below] I'm not sure how this all happened, please give me advice and how to fix this, I've only used Windows 10 so I'm not sure what to do in this situation; thanks.

picture of my computer with blank screen and mouse cursor

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