Inverted color problem

[defaultaytbrpyzk3wo]

Hello, yesterday I was finishing an illustration and I closed it saving the changes, but today I opened it again and the colors were inverted. So I thought it was just that and switched the colors to black and white, but then some geometric shapes showed up on the illustration. I've been searching for help, but I couldn't find anything. Thank you!

[Jacob Bugge]

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Can you use Ctrl/Cmd+Z to get back to the original inverted colours fraom black/white (and then Invert Colors)?

The geometric thingies can be a bad sign that you now have a PDF rather than an AI document.

You may wish to go back to a previous version.