Just a few thoughts here that are often missed by students:
1) You must apply for graduation for EACH program that you are in; degree and certificate, if you are pursuing both.
2) Applications for graduation have deadlines and fees associated with them. The deadline for May graduation for 2016 was posted on the academic calendar as January 15. You may, however, apply for graduation up until the last day of instruction, but you will pay additional fees.
3) Please check your Academic Advisement Report to confirm that you have submitted both your Application for Admission to Candidacy and a Proposed Plan of Study for a graduate certificate if you are expecting to receive them in May 2016. There is still time to respond if you act soon. Contact me after you have reviewed your Academic Advisement Report and suspect that you might have an issue!