I have irregular period the last day that I have my menstruation was feb.2,2012 and after that I have not come a period again, then I had a sexual intercourse with my partner last Sunday April 8,2012.. I am afraid he pulled out before he ejaculate, and I can't determine it because I am irregular and I took pregnancy test last night and it was negative... help me please..

Wait a couple of weeks and try another test. If negative, you are likely not pregnant. If you are not wanting to be pregnant, be sure to use a reliable form of birth control every time you have sex to lessen the chances.