Could you help me find a diagnoses, i havent been well for months and its really effecting me, the symtoms are in'details'PLEASE

 my symtoms are:

 Pressure behind the eyes

Light headness

Dizzyness

Off balance

Faint

and i reguarly suffer from headaches.

these symtoms are making me feel serverley sick, and pulling apart my whole life, i would appreciate an answer from anyone who knows about what i am suffering! please!

Thankyou for your time, and i hope you can help me!