while driving the car my locks just pop up by themselves. then ill lock them again and a few minutes later they just unlock themselves again. what should i check has this happened to anybody else?

The doors shoud LOCK once u move from being parked automatically. Maybe the automatic lock mechanisn is reversed??? just a wild guess

they used to work fine. it just started doing it. nothing has been tampered with.

Your door ajar sensor (don't know the technical name) may be going bad. Check to see if it ever flashes "door ajar" really quick while this happens.

Do you have an auto-start/alarm? This happened to me before, and it turned out it was the computer for the auto-start... Had to disconnect it, and everything was fine