12 yr old super fit girl having high temp 39+ for past five days. Many bloods done, both while having fever and not, chest xray, sugar levels, MRI, urine testing, throat swab, spit swab, nothing at all wrong. So do you have any idea what else could be causing this....in first two days she also had 4 fainting episodes, first one she was out for ten min and not responding to questions for another 5 minutes after waking up.