Hi! For the past few months I have not been feeling right. Symptoms: Extremely lightheaded, Can t exercise past 10 minutes without wanting to pass out (which is such a scary feeling after being a runner for years), last night I woke up in the middle of the night, and while looking for my light switch, noticed I couldn t see much out of my right eye for about 30 seconds. It was slightly blurry and everything was a yellow color. THEN, after ignore these problems I was sitting on the couch, and randomly felt a marble sized lump right under and next to my left jaw bone. It s not painful unless i push it towards my bone, and I can pinch it and move it around. I m pretty sure it isn t a swollen gland . I m 20, female Thanks!