We have arrived in Buenos Aires

We have arrived in Buenos Aires safely, but have not gotten off to a good start.  We purchased a Lonely Planet Guide to South America at the Sydney airport and then left it on the plane.  I arrived with a splitting headache despite flying business class. (I am not travelling well as I get older. ). And after flying all night and having breakfast on the plane just before we landed, we realised it was 9:00 pm in Argentina and time to go to bed.  The only good news is we are staying at a lovely B&B.