Headlight Switch problems of the 2014 Toyota Prius

I was driving at night on back roads when both headlights went out. I stopped the car, turned it off and restarted it to see what would happen. The lights did not go on, however, I found that if I held the switch up as though I was turning on high beams, the high beams worked. I could not get the low beams to work. I was taking someone home and stopped at their house. When I came back to the car and turned it on, the lights worked normally.