Amitryptilline is a psychiatric drug which is usually given for depressive illness, insomnia
So your doctor may have suspected some psychiatric trouble for those symptoms.
Persistent pain above right eye for 2 weeks - he should get is head X-ray ed, and also consult a neurologist
who may also ask for CT scan
Since you say there is swollen lymphnode associated with head ache, the node must be biopsied and examined. if it is due to inflammation or infection,
he may be prescribed some antiinflammatory and antibiotics.
Diclofenanc is a analgesic
which is given for pain;
It is better you consult a neurologist or preferably a neuropsychiatrist.