worried about my friend?

[katie n]

last friday my friend didnt feel well. she was really pale, her hands were shaking, she looked confused, and real tired. said she had a headache. her eyes were like half way open, and her face was like almost white. her face was sweaty too. she said she was real hot. then she looked at me and said "sarah do you have a pen?" ok my names katie, and her other friend in that class name is sarah. we are both her friends though, so i dont know how she got my name wrong, but she was just confused and out of it, like she didnt really even know what was going on around her. then two people walk her down to the nurse, she was real dizzy, about to pass out, and our next class she comes back fine, normal, didnt even remember what happened before, except that she almost passed out, but she completely forgot about how confused she was and how she called me the wrong name and everything. anyways she came back to class fine and better with some crackers. anyone know what might of been wrong with her?
she doesnt have anything wrong with her or anything. she's actually really healthy, so i dont know what it was, i just didnt want to ask her what happened in class, but i am worried about her. also before they took her to the nurse she layed her head down on the desk, and the teacher came to help her up, and she looked like she was about to pass out, and when the teacher lifted her up, she just went limp and fell to the ground, i dont think she went unconcsious or anything, but she was that weak! so two people carried her to the nurse, since the nurse office was right down the hall. it was scary.