That sounds very similar to me, im waiting on my results.
Friday - mild headache and a bit squiffy. Knackered.
Saturday - belting headache and temp of 38.3
Sunday - same as Saturday, felt like i had an insect in my ear
Monday - still headaches and temp over 38. Wont break even with paracetamol. Painful earache, also moved to tonsil on that side (left for me). Horrible achey leg and back.
Today - headaches, temp dropped a bit (but still high 37s). Ear and throat incredibly painful. Leg and backache gone but very squiffy now. Dull ache between my eyes. Dizzy. Forgetful.
It sounds like a virus of some sort, just will have to see if its Covid.