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.

Since your blood pressure of 90/50 is normal for you, please stay well-hydrated. You can continue taking paracetamol (Crocin) to manage the fever and cetirizine (Cetrizine) as needed. Rest is crucial right now. Please consult your doctor for a routine follow-up to review your recovery, and seek immediate medical attention if you experience chest pain, shortness of breath, or extreme weakness.

Since your cold and flu medication only gave partial relief, your symptoms might be due to lingering inflammation or a developing sinus infection. I recommend pausing the multi-symptom over-the-counter medications to avoid unnecessary side effects. Instead, try using a generic saline nasal spray or warm steam inhalation to gently clear your congestion. For the headaches, a generic pain reliever like acetaminophen or ibuprofen can help. Please stay well-hydrated. If your symptoms don't improve in the next few days, or if they worsen, it would be best to consult a healthcare provider to ensure you don't need targeted treatment.

Since you do not have a fever or cough, this may be allergic or vasomotor rhinitis rather than an infection. While Crocin provides temporary comfort, it is primarily for pain and won't stop a runny nose. I recommend speaking with your doctor about targeted prescription treatments like generic fluticasone propionate nasal spray or a non-drowsy antihistamine like cetirizine. These are generally very effective and safe for managing nighttime symptoms. Please consult your healthcare provider to find the safest prescription for you.

Because your left-sided chest pain is spreading to your shoulder, neck, and back, and has not improved after taking paracetamol (Crocin), it is very important to seek immediate medical attention. Please call emergency services or have someone take you to the nearest hospital emergency room right away. Do not drive yourself. While you wait for help, please sit or lie down in a comfortable position and rest.

Having a severe headache, high fever, and a red eye that hasn't improved with paracetamol is a sign that you need a professional medical evaluation right away. These symptoms can sometimes point to an infection or inflammation that requires prompt treatment, such as prescription antibiotics or specialized eye drops. Please visit an emergency room or an urgent care clinic today so a doctor can safely examine you and help you get relief. We want to ensure you are safe and on the road to recovery quickly.