I was in this situation last year. I had to wait until all my professors said when the exam was. It sucks because i had 3 of my exams within the first 5 days, but I had two exams on the very last day, one in the morning and one in the afternoon. I was pissed about this delay so I made my returning flight one week after classes started on January, to make up for the time. You don't do that much during the first week of courses anyways.
lol I hope you have a better luck than me