How soon can i test to know if im pregnant?

How long before I know if I am pregnant after having unprotected sex with my boyfriend? Its been 21days since conception, theres been other days inbetween of unprotected sex as well. I took a pregnancy test tonight from wal mart and it was neg.

u have to wait between 2-3weeks.

[14-21days]

yu shuld be able to test it by now...

yu shuld try again and how many ever day there would have ben between other sex days too.

=]xoxo[=
-stink;

I might be wrong on this, but don't you have to do the test with the first pee of the day when you first get up ?

Home pregnancy tests generally detect pregnancy at 50 mIU - 100 mIU Human Chorionic Gonadotropin (hCG), though you can find early-detection pregnancy tests on the Internet with sensitivity levels as low as 20 mIU. With all diagnostic products, take care to follow the instructions. For earliest detection of pregnancy, use *first morning urine*, as this sample contains the most concentrated amount of Human Chorionic Gonadotropin (hCG). If using first morning urine is not possible, avoiding urination for several hours before using a pregnancy test. Frequent urination can decrease the amount of Human Chorionic Gonadotropin (hCG) in your urine, interfering with early-detection.

to find out if your pregnant take a pregnancy test 2-3 weeks after you had sex
(any sooner and the results won’t be accurate)
in the morning with your first pee is the best time
and take it when your period is due
alternatively, see a doctor for a blood test
this will both let you find out quicker and give you more accurate results