My expected period date was 26jan and my periods not come and i do the unprotected sex last on 28jan and i also take the emergency contraceptive pill within 2 days and i got the bleeding after 6 or 7 days i am totally dipressed about that i am pregn?

It is too early to feel depressed. There is no clear evidence that you are pregnant. You took the emergency contraceptive pill within 2 days of unprotected intercourse which is appropriate. It also seems that you had bleeding a few days after intercourse. If this was accompanied by the usual signs & symptoms that accompany your period, then this is another sign that you are not pregnant.