Hi. I'm 28 Years Old.married For 3 Years.been Trying To

Hi. I'm 28 years old.married for 3 years.been trying to conceive for last 6 months.My gync Dr prescribed ovacare myo (A+B) and Piosafe MF tablets. I'm taking these tablets for last 16 days. My last period was on December 27th. And till now I haven't got my periods. And it's late. I have done a home preg test and result is negative. Is late period is because of the tablets? Please help me with this..