It's very common to take the test incorrectly. You should retest and make sure it's the first urine of the day. Also, you need to seek your family doctor or planned parenthood and get a form of contraception to prevent further pregnancy. There's only a small window of about 48 hour you are fertile during your cycle so there's a good chance you may not be pregnant. This is why many women have to try for months to conceive. Try to relax and retest.
Wether he did or didnt u could still have sperm inside u, and it can last for days so its possible for u to have gotten pregnant and the sperm met the egg dats later. If u have been stressing or working allot even workin out hard it can delay a period. So calm down relax ur body and in a few days or so take another test if u still havent gotten ur period cus it may be too soon to tell right now if u are.
did u ask him if he cummed in you ;)