Hello Mandycahill1,
Thank you for reaching out in Apple Support Communities. We understand you're attempting to re-pair an Apple Watch to your iPhone, but it might still be paired to your device. We'll be happy to help.
To help determine, if an Apple Watch is paired to an iPhone you can open Control Center and see if there's a green iPhone icon. For details and a visual, please reference the section in this article that says, "Check your Apple Watch connection": If your Apple Watch isn't connected or paired with your iPhone
Now, if you'd like to unpair the Apple Watch and re-pair it to your iPhone, you can follow the last section in the article we provided that says, "Unpair your devices, then pair them again."
Please let us know if that helps.
Kind regards.