Engine Mechanical problem
2005 Toyota Prius Automatic 72000 miles
About 200 miles into a 250 mile trip, my light signifying " Replace engine oil" came on. That was two days ago, and I have not had time to replace the oil. I have only driven it the remaining 50 miles back home from when the light initially came on, and the 10 minute drive to the subway station in the mornings, and then drive back home in the evenings. If I wait until the weekend (three days from now), will I be messing up my engine? And can I change my oil myself, or do I need to take it to Toyota?