What sickness do I hold?

It's nothing any serious. I merely want to buy some medicine for it. I don't know what it is though. When I shift lie down I perceive alright, the bad savour in my mouth is gone and the little headache sense is also gone, but when I stand or sit up it comes back. What drug should I take?What sickness do I hold?
sounds resembling a bad migraine, bring ibuprofen
anxiety
Could be high blood pressure, better see the doc.