How to tell the difference between God actually speaking to you and an intrusive thought?

I’ve really been struggling lately with intrusive thoughts. They’re not bad or anything like that, more suggestions to do things. Like driving to work and thinking “turn left at this light instead of right” kind of thoughts.

And I’m not sure how to tell the difference. I get the whole “you feel peaceful when God speaks to you” part but sometimes I feel nothing at all.

What are some ways I can tell the difference?