Nighttime body aches/chills/fever like symptoms but afebrile

26F, 5’1”, 120 lbs. Hx of POTS and insomnia.

I work a fairly physical job (healthcare) and have been experiencing episodes of chills/feeling feverish, extreme fatigue, widespread body aches, and severe tenderness to touch. Sometimes even something barely touching my skin hurts enough that I want to scream. It happens mostly at night, especially after more physically demanding workdays, although not always. I never actually have a fever, and by the next morning I’m usually back to baseline besides being tired (which I pretty much always am).

I also have fairly significant chronic neck/back pain but haven’t had imaging yet. Autoimmune/inflammatory labs in June were normal; CBC/CMP were essentially normal as well. My PCP suggested fibromyalgia and trialed LDN, but it made me feel significantly worse, so I’m back to square one.

Anyone experience similar symptoms?