I have had a cold/flu for two weeks. Last week I started having sinus pain which I had a online consultation. The medication seems to be reliving the sinus issue however I am now with a constant head ache which does not seem to be relieved with panadol. I have also started to cough quite badly in the last few days also which makes the head pain worse. Moving from a lying position to upright position also causes some aching. Is this constant pain likely to be related to the sinus or should I have it investigated at a hospital? I am a Warfarin user and take medication for cholesterol.