Hey there Nettie,
I apologize about the late response, thank you for being patient! Were you able to fix that Chromecast issue? If not, I'd be happy to help out, as I can imagine this issue is quite confusing. When you mentioned the LED light on the Chromecast is orange, is it pulsing or solid orange? In any case, if unplugging and plugging back in the Chromecast doesn't resolve the issue, you'll need to factory reset the device again. You can do it using the button on the Chromecast itself again, or you can do it from the Google Home app. If one option doesn't work, try the other.
I look forward to your response, and if you have any other questions or concerns for me, please let me know!
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Thanks for the help, Jeran.