I don't believe in using western medicine except in cases of broken bones or emergencies, but after 10 days I would be worried too. Have you looked up rocky mountain spotted fever? The fact that it worsens at night leaves me stumped. Have you been bolstering his immune system with sodium ascorbate and vitamin d? I would always give GSE drops in OJ with any immune imbalance. I take 7 drops in a shot glass of OJ (OJ is only thing I have found that masks taste, and be sure to stir it off bottom until it is drunk, it sinks to bottom of glass and sticks... twice daily, and then another plain shot of OJ for a chaser to kill the taste, when I think there is something living in me that I don't want. I weigh 120, up it for his weight. I am not a homeopath or ND or health professional btw.... I would suggest using the clinic to find out what it might be, but then developing a plan for treatment based on immune support/homeopathy/ natural medicine. Or if there is a natural doctor in your area, seek out their diagnosis first. But I agree 10 days of an illness is time to get help with it. We are never sick more than 2 days. If an adult had a fever over 101 for more than 5 days, that would be rule of thumb to seek outside help IMO.
To begin to save the world, we must first nurture the children. Read "The Continuum Concept: In Search of Happiness Lost"
11 yo dd1-
; 6 yo dd2-
, 6 yo ds1