Dear Doctor , I am of 25 yrs.I have a thyroid problem since last year,i take daily Thyrox-50 tab in empty stomach.My problem is that my periods delays.I went to a renowned Doctor with this problem,but she said that your menstrual cycle is of 60 days and she didn t prescribed me any medicine for this,is it really normal?and this time it has exceeded more than 2 months,please suggest?