I am 21 years old Female 

I am noticing this past week I have had a horrible headache I am nauseous I get dizzy looking around I can't see far away and I have had loss of appetite My body is sore sometimes more in my upper neck and back! Stomach always hurts and I am always very tired I'm trying to figure this out! I am tolerant bro wheat and gluten but I stay ways from all of that and the bad foods please help