no headlights or parking lights!!

I have a 94 Chevy Lumina and the headlights went out when I was driving a few weeks ago. I have replaced the circuit breaker, the headlight switch, and am looking for the relay but can't find it. I am desperate. I've taken it in and the mechanic told me to get the new switch, a $200 switch that was no help! Any ideas.

Check the fuses again (inside the glove compartment). If they're blown, you might have a short. Also, replace the switch assembly (you can buy one from a junk yard for a few bucks). To replace it is the easiest job ever. I hope this helps...