Pregnant women - anyone experience this?

I was driving home and all of a sudden I felt like I was in a "dream" state. I found myself clutching the handle on my door, and I was spaced out and everything felt surreal. My mom asked me a question and I said yes. She didn't reply, so I said "Did you hear me?!" she slightly nodded and I asked again, my heart sped up a bit and I felt lightheaded. The whole drive home, I felt like I was in a daze and I was dreaming! I got the slightest tinge of nausea but it went away. I felt this way for maybe 6-7 minutes, then I got home and laid down and I felt normal. Has this happened to anyone?