Welcome to HCM,
You have a positive family history of epilepsy
,but do not have seizures till now but if you feel some thing abnormal then you should visit a Neurologist
and get examined and if it is considered necessary a EEG and CT scan
of head or MRI may be performed to detect any abnormality.
If every thing is normal and you have just anxiety
then proper counselling
and if required short term treatment with anti anxiety treatment will help you.
It is not absolutely mandatory to have epilepsy if it is present in family.
Just relax and do not worry,hope nothing very serious is there and you will be all right.
Just take care