AP/IB Conflict: APUSH Exam Makeup

So I’ll be out of town for APUSH on the normal May 5th, 2017 morning exam due to an international academic competition. I payed to take the Form B makeup on May 17th (morning), but turns out I have IB Spanish that day too. What are my options if I can’t attend the makeup exam due to an unavoidable conflict (IB exam)? Is there really another late-makeup day for some AP exams?