My 1998 overheats even after i have changed the thermostat and fluahed.the radiator what else could the problem be

What is your question?

While Driving my car a short way, the car over heats, i have changed the thermostat which definitely needed it, still overheats, then i flushed the system added new coolant then drove it less than a mile and it overheated again...no noises,no leaks. What could the problem be?

What makes this problem better or worse?

Letting it cool down

How long has your 1998 Lincoln Continental had this problem?

A few days