I hv a dry cough and a congested headache but when I blow my nose it's clear. Is there anything to help?

Some suggestions. Your illness may be a viral infection, but if there is a high fever, localized pain, worsening or persistent symptoms, a follow up visit should be done. Typically a viral illness will resolve within 10 days. Nasal saline, tylenol (acetaminophen) for fever, fluids and rest are advised.