Hello! Earlier today I was standing in line and I started to feel strange. This is the second time I had that feeling so I knew what was about to happen. The first time it happened I was at a concert and passed out. This time I sat down before it got worse. It starts with patchy vision as in I'm trying to black out then everything sounds really muffled. I have no idea why this has happened to me twice. Should I see a doctor about it?