You need a proper assessment and investigation here since there can be many causes
for memory loss
, headache and dizziness. Most common causes
of short term memory
and concentration impairment are excessive stress, psychological reason, recent head injury, certain medications, hormonal imbalance and Alzheimer’s disease (if you are in old age). I would recommend you to see a neurologist who can evaluate the details of your case and could better determine the insight of your situation.