What could be the cause of these symptoms?
Right before lunch my head started to feel weird. Then I suddenly got very tired and my limbs felt like they wanted to sleep. Then I got waves of chills down my body and goose bumps on my arms and legs but it was warm in the room. It was an odd feeling like hot and cold at the same time. My appetite has been bad the past two days but today it's gone. I still feel very tired and have no appetite and I feel irritable and week. What could this be?