What are the potential diagnostic considerations for a five-day history of persistent fever (initially 104?F, currently 99-101?F) accompanied by a severe headache and unilateral conjunctivitis, which developed on day four despite treatment with antibiotics and antipyretics and a negative dengue test on day three?
Given your fever, severe headache, and recent red eye, we should consider a few possibilities since your dengue test was negative. These symptoms, especially when not responding to standard antibiotics, could point towards certain viral infections like adenovirus, or other infections such as leptospirosis or rickettsial diseases, which can cause eye redness and headaches. I strongly recommend visiting your doctor promptly for specific blood tests to get an accurate diagnosis. Please stay well-hydrated, rest, and use paracetamol for comfort while seeking an in-person evaluation.