If you made a payment on your Discover credit card and received a confirmation number, but your checking account does not reflect the payment, there could be several potential explanations. The payment has not yet been processed, or there was a delay in updating your account information. It is also possible that an issue with the payment, such as an incorrect account number or expiration date, prevented it from being processed. If you are concerned about the status of your payment, I recommend contacting Discover directly to inquire about the issue. They should be able to provide you with more information and help resolve any problems with your payment.