Hello and Welcome to ‘Ask A Doctor’ service. I have reviewed your query and here is my advice. Head for three days can have man reason and needs a clinical evaluation and examination to get relevant investigations like CT scan of head so that an appropriate diagnosis can be made for a proper management. Dilated pupils even on putting in light in them indicates a proper and thus needs all the things just mentioned above. I can understand no insurance can be a big problem but somehow you have to get these done if your Doctor thinks so on clinical evaluation. Till then take Paracetamol, nasal drops and symptomatic treatment. As for food intolerance the basic rule is to identify the foods and beverages that cause problem and stop these altogether. Get a stool tests and blood tests particularly for thyroid so that any additional treatment can be done as required. Medicines for sleep should not be taken till the cause of headache is diagnosed well. Hope I have answered your query. Let me know if I can assist you further.