Thanks everyone! I got my car back at around 4:30 PM the very same day!

Your prayers really do work! And there was only one thing wrong, my car's Check Engine light came on because of a "large vapor leak". That could have been because the gas cap wasn't on tightly enough but John, the mechanic, said that he checked it and it was on as tightly as it could go. So I have to keep driving it until and unless the Check Engine light comes on again and if that happens, they'll put an inert gas in my gas tank to check for leaks. Thanks again!