Lately i keep feeling nauseated and i don't know why. sometimes i get headaches to. what could be causing this?

Need to see doc: Brittnee, it is not possible to tell from the symptoms you are describing. A doctor Needs to obtain a thorough health history from you, and ideally also examine you. You are likely to also Need blood and Urine testing. Could be anything from a whole list of causes ranging from harmless to serious. So again, a good start would be obtaining a thorough health history from a doctor