Welcome to Healthcare Magic Forum
To know if ur pregnant or not, u wil have to do the urine pregnancy
For which a small kit is available at every medical store and is very cheap. Or you can visit a pathology lab and do the test there.
Sometimes menses can be late due to stress
, exertions, hormonal
disturbance also. So just do the test. If its negative, then wait for ur menses for a few more days. If they do not appear you can visit a gynaecologist and also do a pelvic USG to find if there is something wrong inside or not.