Hello..
Sorry , I don’t know much relation between date & irregular periods..
However, there are many causes of irregular or delayed periods like stress, anxiety, sudden weight gain, medications,
thyroid dysfunction, increased
Prolactin level & most important PCOS...’
So it’s important you get some baseline investigations done like USG lower abdomen & blood for
TSH , PRL &
sugar ..
At the same time you need to do regular exercise & avoid weight gain..