PVT with wrong cc info Jul 2016

Hi everyone, reading mixed info and was wondering if anyone might be able to clarify. Took the NCLEX-RN exam yesterday and stopped at 93 questions and walked out having no clue how I did. Came home and about 4 hours later entered in all my info with an expired card and got the pop up of " our records indicate that you have recently scheduled this exam. Another registration can not be made at this time" a couple hours later, I tried once again and used a different expired card and got the same pop up. Anyone experience the same thing? Do you have to put in a valid card for it to be accurate? I still have another 24 hours to wait and I am very nervous! 😬 Any advice would be greatly appreciated!!