I used my email not my iCloud to set up the watch and now I can’t get my watch to pair with my phone

See the 'In addition, the sensors will work only if you wear your Apple Watch on the top of your wrist.' and 'Start a support request' sections in:

How to remove Activation Lock - Apple Support

Activation Lock is designed to prevent anyone else from using your Apple Watch if it's ever lost or stolen.

About Activation Lock on your Apple Watch - Apple Support

Activation Lock is an anti-theft feature that cannot be bypassed.

You can request an Online Activation Lock Removal HERE.

Or this;

If you can't remember/gain access to the apple id that paired the watch to the phone.Take the watch and it's receipt along with some photo id and any other proof of ownership to an Apple Store and request that they remove the Activation Lock for you.