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The episode of fainting
5 yrs back when the doctor told that you may lose your memory whether it was investigated or not.Whether there was any pathological problem like a tumor
or reduced blood supply to a certain part of brain which is seen in CT scan
so based on what the doctor said this about memory please describe.Presently you are facing a short term memory which can be as a result of stress
in your personal life.Since you said you have problems in your family the loss of memory can be due to your stress that is mental tension.Please consult a Neurologist
and get investigated keeping in mind your past fainting episode.If the reports are normal then you are probably having memory problem due to stress.