I appreciate the concern jcc, but this doesn't seem severe enough to warrant a trip to the ER. Yes its happened twice, but 10 months apart. If it was happening daily or weekly, yes, I'd be at the ER. However, I will be calling my Doctor tomorrow.

One issue I've always had that may or may not be related is that I've never been able to read while in a moving vehicle. I'll get nauseous almost instantly. Even now with google maps on my phone, if I need to do more than just glance at it while moving, I have to stop to do it. I've never gotten motion sickness in general just riding in a car though.