Hiiii
This month my periods is not coming at the actuall time.if m not physical with my boyfrend fr last 6 to 7 months.. then pregnency is not possible... I really worried about that

It's very common to have a late period, or even skip one.
It's possible to be pregnant and still have periods, although not for 6 to 7 months. You'd be quite large by then too.
It's just no way to know if someone is pregnant during the first 2 months or so without a test.