I was operated for oral cancer 2yrs ago. I underwent radiation therapy also for 28days at chennai.6months back i developed primary hypothyroidism ,im taking eltroxin 100mg daily.my problem is around 10days b4 my periods i develop a kind of giddiness.irritation nd some different feelng that i dont understand myself,feel sleepy and dnt know what.its happening from 3 to 4months,but only for 1day.after that im normal.im 32 yrs,mother of 2kids.developed seizure during 1st preg,was on eptoin for 4yrs,npw taking lobazam 10mg at ngt. pls help