help with check engine light
 

I have a 2002 non turbo model.
i have about 128,000 miles.
the car has been a dream for the last 4 years.

today i fired the car up and i had the check engine light start to blink then go off completely. While getting the car home i would have the check engine light blink and stay light then continue to blink. also while idling the car would be shaky running very sluggish like it was almost out of gas. i had about 3/4 of a full gas tank..

from doing some research blinking lights is a misfire in the cylinder and i need a new coil...

i am not sure of anything and wanted more input...
please help...i am going to go to advanced auto parts tomorrow and get the to check the system and see what codes come up..

what do you think is wrong?