Have you checked that all of your transfer credits, study abroad credits, AP, IB, summer, or any other external credits appear on your transcript and degree audit as expected?
Something missing?
Make sure the registrar has all official transcripts, score reports, and approvals. Request all official transcripts and file all necessary approval forms ASAP, so the registrar has them no later than the October 1 External Credit Submission deadline for Feb grads. (May grads have a little more time, but why not take care of this ASAP to avoid future stress?)
Failure to submit these in a timely fashion may delay your graduation.
If you have study abroad credit, be sure your transcript has been sent to the Barnard registrar and that you have received all necessary course approvals. Follow up with advisers and study abroad office with any questions.
Review guidelines for external credit on the registrar's website: https://barnard.edu/registrar/external-credit.