OKAY IM PRETTY CURIOUS HERE LOL SO ALL YOU PREGNANT PPL PLZ HELP AH SISTA OUT!!?

okay i had my period 3 days before the actual date my period was to show up,and the thing that bothers me is that my period normally stay for like 4 to 5 days.....this time its lasted for just 3........i havnt had unprotected i always use condoms....and im curious about everything so even when im jus done having and my bf takes off the condom i figit with the semen in the condom just to see if it dont burst are nothing.......any ways my next period is the 29 of january i think..and i dont know if i would see it again ,im a bit paranoid but i'll really like one of you good folks to explain the meaning of all this to me please...mwah xxxxx thanks much