Did I do the right thing?

Let me give some backstory.
Today we were running the mile. My partner ran first. At around the third lap the teacher said my name. I went up to her and my friend was crying. She said “can you take her up to the nurses office?” And I replied “of course”. I thought my friend had an asthma attack. About 30 seconds in I ask her “what’s wrong?” She replies with “someone had a bloody nose and my dad had one when he died.” I had no idea what to say, I just said “oh,”. I thought about saying a bunch of things but didn’t know the right thing to say. I drop her off at the front office and walk back. I couldn’t even jog. It was just so sad. Did I say the right thing? I have no idea how to comfort people. Her dad probably died around 6 months ago.