2009 Toyota Corolla diesel gas on unleaded

Hi. I accidently put in about 2 gallons of diesel gas in my unleaded only car. I wasn't paying attention until I drove for about 3-4 miles then I noticed something went wrong so the car stopped working and I was lucky I could pull over to the side.

what is the cheapester way for me to get it to work? I heard if I fill up the tank with unldeaded fuel then the diesel will eventually dilute? Please help! Brand new car and I really need this car for school!