Good morning doctors and nairalanders. Two nights ago, I woke up to ease myself and realized I was cold. Fan was on though but I wasn't covered. Then I took a blanket and covered myself. I woke up with my whole body very very hot (no chills). I don't think it's fever but I might be wrong. Few hours later, my waist was paining me but it later subsided then came a very severe headache that lasted from Sunday morning to Monday morning. I didn't take any drugs. The headache has reduced though I still have episodes of slight headache plus pain in eye socket. I didn't take any drugs cos I'm against self medication. Please what test can I run to ascertain what caused that? Thank you