Dos any one no why im feeling like this?

im a 19 year old girl for the past 6 months i have been getting soar heads but the pain has got really bad some days its not as bad as others im always tiered my back really hurts two i feel like this is making me very bad tempered and i no this sounds sick but im finding things funny what really are not funny but have a bad phobia of going 2 the doctors dos any one no what it could be many thanks