Are you taking your vitamins? I will also suggest drinking some liquid iv or Gatorade or something to help with your electrolytes. Maybe iron supplements?
Make sure you keep your sugars up, drink juice or eat fruit right before. I also try drinking a cup before and one cup during
Sometimes this happens to me. Usually during the letdown 🥴 not sure what causes it but I try to stay fed and hydrated and that helps to keep the dizziness at bay