I am 20.and I have irregular period.by that I mean I can not expect when my period comes. Last month, April 13,was the last day of my period. % days after I had an unprotected sex with my boyfriend. But it was short.5 minutes or so and he did not ejaculated inside me. This month about 3rd week, I bled, and I do not know if its implantation or menstruation.it lasted about 4 days and I have to use pads.there was dark clots.help me..

You don't have to have intercourse for an extended period and your boyfriend does not have to ejaculate inside you in order for you to become pregnant.

The only way to know 100% is to buy a HPT and use it.

(If you had "heavy" bleeding you are "probably" not pregnant.)

The clots in your period are from the lining of the uterous, if the uterous shed its lining, you are not pregnant.

If it lasted 4 days, probably not pregnant.

BUT like JudyKayTee said, take a home pregnancy test. Also unprotected sex can be dangerous if you or your haven't been tested for STDs, and of course you CAN get pregnant even if he doesn't ejaculate inside you.

Maybe go on the contraceptive pill, this will regulate your periods as well as prevent pregnancy. You still need to use condoms unless you have both been tested for STDs though.

Hope this helps xx