2008 cts check engine light blinked then went off HELP PLEASE
 

I wanted to know if anyone might know whats going on with my car it just started doing this I was on the highway and felt something in the gas pedal and like the car didn't want to accelerate and the check engine light came on and blinked about 15 times and went off I called on star to see what was wrong and they said everything seemed to be ok but maybe something had happened to my emissions system so before I take it to the dealership can anyone give me any advice. Also im new to this so did I give enough information about it car is a 2008 cts with 120k

Anything???