Hi, Welcome to Health care magic forum.
You are an epileptic, and using medicine since then, but never had the weired smell, which you are getting since 2 days.
It appears to be due to the infection in the nose, or
indigestion,
which can cause the smell.
I advise you to consult a physician for diagnosis and treatment.
Inform your doctor that you had
seizure,one year back,because you are not expected to get the seizure, during the treatment,for 3 years,which confirms the success of treatment,and then you can stop treatment by tapering the dose.
Wishing for a quick and complete recovery. Thank you.