Hello, Thanks for the query to H.C.M. Forum.
If I were your doctor for this case of
severe headache and
dizziness , I would come up with these possibilities , these includes.
1 Any tumor in the head in occipital region.As you mentioned that there is severe headache ,
rapid weight loss, dizziness, tiredness . Diagnosis can be confirmed by M R I of posterior part of brain .
2 Hypo tension ,this is the most prominent cause of dizziness, headache .
Diagnosis can be confirmed by physical examination by a physician .
3 Anemia is one more such reason , so please get in blood for
hemoglobin level
4 According to your age group ,these symptoms may be due to tension ( stress) .
In my opinion first of all
consult a neurologist and get his opinion and M R I of posterior part of brain.
Good luck. Dr.HET