I had sex with my bf on 12 march and i used unwanted 72 and again we had sex on 16 march and again i used unwanted 72 and after 1 week on 25th march i'm on my regular periods and on april 25 i didn't get my periods and 4 weeks had passe am i pregnant?

Hard to guess: It can be hard to tell if a woman is pregnant because some of the symptoms seen in early pregnancy can also happen in non-pregnant women. A urine pregnancy test gives a reliable result if done correctly. One can test about 3 weeks after sex (3 weeks after when conception might have occurred), or 1 week after a "weird" period. An Ob-Gyn doctor can evaluate any persistent or worrisome symptoms.