A trip to the doc would definitely be worth it. This past spring quarter I had almost passed out twice during class... just out of no where. My vision and hearing went out and I could barely stand up. It was scary as hell and I really dreaded going to the doc but I did. Found out it was actually just an inner ear infection that was easy to take care of.
I'd definitely go to the doctor and just have it checked out. Hope you start feeling better soon.
