I'm currently a college student (female, age 20), and today at work I got very warm all of a sudden and began sweating. In addition, my ears started ringing, my vision blurred slightly, I felt extremely light-headed like I would pass out, nauseousness, and I couldn't walk straight. Once I was able to make it to a chair and sit down, I felt better within a few minutes, but the symptoms lasted about 3-4 minutes before I was able to do so. I had an experience that felt identical to this while on a mission trip in another country, however they said that was due to dehydration. There were extenuating circumstances that happened there, and I am fairly certain that's not the cause of what happened today, so I'm hoping someone can tell me what it likely was. I did not go to a doctor, as I can't exactly afford one if it isn't like threatening, so I appreciate any help you can give me.