Today I kind of passed when I was standing outside in a line for about 45 minutes. I didn't eat anything all day except for a few pieces of candy and I drinked a little bit of juice. When I was standing in line I just felt really lightheaded and weak out of nowhere then I feel down a little. When my mom was trying to hold me up everything went black for a few seconds but I could everyone talking and I was able to respond and talk to my mom. Could this just been a sign of dehydration? Once I came back completely I had a weird metal taste in mouth. Is that a sign of a serious issue? I had this happen to me before like 4 years ago when I was really stressed out I didn't fall down and once I sat down I was fine. But it when it happened I didn't eat anything for the whole day again. My mom thinks it could be a sign of diabetes or me being anemic but I think it's because I didn't eat or really drink anything.