Greetings from Amazon Seller Support,
Thank you for contacting us.
I have reviewed your email and understand that you are going to get new credit card number from bank but that would take 2-3 days and you want to know how it would affect on your account. Let me address your issue.
Please be informed that, this can be affect those orders that you need to fulfill within 2-3 days. As late shipping and late response to buyer's email could be affect your metrics.
I would like to give alternatives to handle this issue, so, that will save you from any affect on your metrics and performance.