My Apple Pay was not working yesterday or today. What can i do? I called my credit card company- they say everything is working on their end.

Hi

It may help to check that you are following all of the instructions here, including as demonstrated in the linked demo video:

Using Apple Pay in stores, within apps, and on the web - Apple Support

If the issue persists and you are concerned about a potential hardware issue, then I suggest that you contact Apple Support (remote diagnostics and/or mail-in service may be available), make a Genius Bar reservation or visit an Apple Authorised Service Provider for assistance - for an iPhone, for example:

• US: iPhone Service Answer Center - Apple Support
• Elsewhere: Apple - Support