What's the difference between "I'm shocked." and "I'm in shock."?

I've studied English since I'd like to speak English like native speakers do.
I usually don't care which I use, but I'd like to know their subtle nuances.

How and when do you use each phrase? Or are these interchangeable?

Thank you.

Re: What's the difference between "I'm shocked." and "I'm in shock."?

I'm in shock is common in everyday speech, though. It emphasizes the ongoing nature of the feeling of being shocked.

Re: What's the difference between "I'm shocked." and "I'm in shock."?

Sorry, it took a while to come back here.

Thanks to the example of Trump's election, I understand their usuage well.
I also understand that "in shock" is casually used in every day speech.

Thank both of you.