When running quick errands.. For example, I have doc apt today at 445.. I will need to leave by 420.. I will feed lo before I leave .. He is usually on a 2 , maybe 3 hour eating schedule. What do I so if he eats at say 6 and I'm still not home? Do I need to pump at this exact time or can I wait until I am home? What if I'm literally being examined at the time he is eating and cannot pump? Should I pump the second I get in my car? Thanks!!