Our little one just came home 2 days ago, and the first scheduled appointment isn't for four weeks so we asked a similar question. We were told that in case of urgent things, just go straight to the hospital, if less urgent, call a Paediatrician. I guess that if it is urgent, they'll look after the baby first and then do the paperwork afterwards. She should bring her papers with her regarding insurance or the
EHIC if she is EU based...
I imagine that Childrens hospital is best, but the University Hospital has a Frauenklinik too if the baby is very new (they have neo-natal care I believe)
Hopefully the trip is good and there is no need for either