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.

I understand how frustrating it is to deal with a stubborn high fever and headache, especially when paracetamol (Crocin) isn't bringing relief. At your age, an acute fever with a posterior headache could stem from a severe viral infection, a sinus issue, or occasionally, a more serious infection requiring specific medical treatment. Because these symptoms are persistent and not responding to home care, it is very important to see a doctor promptly for a proper physical exam.

While Crocin (paracetamol) temporarily relieves the fever, it only manages the symptom rather than curing the cause. A prolonged fever with normal initial tests is often called a 'fever of unknown origin.' I highly recommend consulting an infectious disease specialist or an internal medicine physician. They can perform specialized tests, such as advanced blood work or detailed imaging, to find the root cause.

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.

You can continue taking Crocin for body aches and steam inhalation for your cough. To help with the loose stools and stomach pain, please drink oral rehydration salts (ORS) to stay hydrated while traveling. For acidity, a generic medication like famotidine can help, and dicyclomine can ease stomach cramps. Please eat light, bland meals and carry water with you. If symptoms worsen, please see a doctor.

A fever lasting three days with eye pain, body aches, and weakness can be draining. Since the fever is returning despite taking Crocin (paracetamol), it is important to consult a doctor for a proper evaluation. This could be a viral infection, such as dengue or flu. Please focus on drinking plenty of fluids (like water, coconut water, or broths) and getting complete rest. Avoid taking other pain relievers like ibuprofen without a doctor's advice, as they can sometimes be unsafe depending on the cause of your fever. Please see a healthcare professional soon to help you recover safely.