In the last couples days I have been having random bouts of both dizziness and nausea , with no real explanation. I did recently change my diet, though not drastically. I am a pescatarian and have recently started watching my carb count and eating less of them. I also donate plasma, though this has never affected things before. I am 21, female, and am not taking any medications save for my implant birth control Implanon. Would there be any explanation for this?