Hmmm...that is definitely a difficult question. For such a specific situation you should really contact the Service des étrangers section of the local Préfecture directly. Do you have a contact you have been working with for your Carte de sejour?

General information about the application process can be found at "Étrangers en France".

From what I understand, it appears that once an application has been made, the applicant will be given a temporary receipt (récépissé). This is valid for three months and can be renewable. It permits stay in France while the application is being processed. Have you received this receipt?

Best of luck & let us know what happens!