About 3 months ago, I was carrying one 1inch pvc pipe through my mudroom to the basement when I bumped the pvc pipe into the ceiling fan in the mudroom. We didn't notice till the end of the day that the fan and light didn't work. Didn't really think too much about it it cuz the fan is pretty old. Got up the next morning and the light and fan worked. Since then, it has stopped working then mysteriously it would work. It is tied into the hallway ceiling light, light above the kitchen sink and 2 outside lights. They all randomly go off and then come back on whenever they want. BUT....now they won't come back on at all. We have checked all switches, connections, etc and all is good. What are we missing?