I woke up this morning and blacked out?
So, I was at a friends house overnight and when we woke up, we began to make breakfast. About five to ten minutes later, I felt like I was about to throw up and went to the bathroom. As I was walking there, everything went black and I couldn't see right. After I felt my way to the bathroom, I laid next to the toilet as the blackness went away. I was shaking, and I didn't know what happened. When I stopped trembling I went back to making breakfast with my friends. Since then, I've been fine. Is this normal??? Should I be concerned?