Is Irregular Menstruation Normal?

hi. I m 29 yrs old. now married from the past two months. I am not pregnant but still I have not got periods after my marriage. its now been two months and 20 days when eaelier I got periods. before marriage also there was irregularity in my periods but it used to come after two months. my tsh (rhroid stimulating harmones)are also normal. kindly suggest me why is this delay occuring and plz suggest any medicine so dat my periods can get normalised. thank you