Hi thanks for your question.
Yes,Please don't take your symptoms lightly.Most probably you have got fracture
of skull bone whic is responsible for dent, along with haematoma
(collection of blood under skin) which is increasing in size.Dizziness
,frequent headache could be due to haematoma from bleeding inside your brain.Ear pain
and frequent nose bleed could be part of fracture of skull bone.I would suggests you to consult a general surgeon
who may get your CTscan head done to rule out or confirm any fracture of skull bone or haematoma inside your brain.Finally you may need consultation with neurosurgeon if there is haematoma or fracture on CT scan.
Hope this answers your question.