Check Engine Light came on... any thoughts? Update P0300 Misfire

[dpgx5]

Hello everyone...

I was driving yesterday night on the highway and it was raining, everything was normal, as i went to press the gas to accelerate past someone, i felt the X stumble and it wouldnt go.. check engine light pops on and i got scared and slowly just got off the highway.

I pulled into a street shut off the car for 5 min and restarted it.
Light went off and seemed fine, but to be safe i just drove it home.

This morning i was ready to leave, started it and again and the X started shaking... Im not sure of what is wrong with it.

Its an 06' with 49000km... have not had one single hiccup till now.

Any thoughts? Is there a way to check what code # ?