head hurts

I'm having headaches lately. Almost every night I have headaches. I have to pop 2 panadols every night to sleep. Then when I wake every morning i felt the headache is gone till the next night its come back. I don't know what's wrong with me. My panadol supplies in my room is finished and I have to ask my parents. And get the usual nagging and questions of why? Why am i having the headaches? I don't know how to answer. I just want my panadol and get it over it. Sometimes when I stand up i have this sudden dizziness and almost blackout feeling. Low blood pressure and low iron. Sigh, headache please go away. I want my peaceful nights back.