2000 Stratus with Oil in the radiator

I took my car 2000 dodge stratus to wal-mart the other day to get an oil change after leaving I noticed my oil light was on so I took the car home and parked it for the night thinking maybe the oil has not ran all the way thru or something, ok so in the morning I get up to go to the corner store oil light still on but after about 5 minutes of sitting in the parking lot of the corner store the car cuts off like I turned it off or something. so i drive the car back home and park it, call wal-mart and they come out and look at it and say nothing wrong.....anybody know what i can do or what i should do.

have you yourself checked the level of the oil?