I woke up last night with uncontrollable shivering, high fever, 103 degrees, severe nausea, chills, disorientation, felt faint when I got up to go to the bathroom, in general I felt like crap. Symptoms decreased during today, by 4:00PM the fever was gone, as was the nausea, chills, shivering. I still feel somewhat disoriented. Haven't been to a malaria region in about 7 months. What do I have