One thing to note is newer cars that either have LED or were offered with an LED option should have lamp failure warning on the dashboard and most likely will not blink faster.

Also make sure that you clean your lights especially as we head into winter with all of the road salt. If you have to use windshield wash your lights need cleaning.

Last point is if your headlights start to get cloudy you can easily clear up with car polish rubbing compound. The silly piece clear plastic can cost upward of $1000 so they are worth maintaining.