I am 32 yrs old. I have thyroid. but it is normal now. still taking thyroid tabs. I am taking tab fortisure f tab. I had started it 3 months back this tab and my periods delayed by 8 days when i started. and stoped it for 2 months and again started same tablet. now again my period is getting delayed. i am missing my periods from last 3 days.I always had regular periods. Now i am in stressed whether i am pregnant or its becaus of this tablet my priods is delaying. Please help me Doctor.