So i got my period on the first week of January this year, then i skipped my period until April, and skipped May then got my period first week of June. at the time pregnancy wasn't my worry because i didn't have sex. i was suppose to get my period first week of July (which i didn't) the i had sex with my boyfriend the supposed day after my period, it was about 5 minutes of unprotected sex before i realized we should protect ourselves if we don't want to have a baby just yet, but idk what could be causing me to not get my period? could i be pregnant? or is my period just really stupid?