Apple watch

Hi,

My watch sends me an Apple ID Verification prompt every 1 minute!!!!

Every time I attempt to enter the password it says its not a valid one!!!

I even changed my password (2 days ago) & it doesn't recognise that one!!! It has a capital letter midway through the password & I have no idea how to add that. I attempt to enter the password by writing it in, but it doesn't work!!!

It is driving me nuts. I just want it to stop...