Kenny,
Contact the NMC and ask them to amend your application so that you are also renewing your existing document. I was in the same boat and that is what I did. Worst case is that you will have to pay for two issuances, the first being your renewal and the second being the new license when you pass your exams. Ask them for delayed issuance in case you can test before the expiration and pass everything.
Good luck,
JK