well, i dont have 100% regular periods but i usually have my periods every 28-34days, i had unprotected sex quite a few times during the last month and a half, i have light cramping bloating , headach but no periods??and i took a home pregnancy test a week agoo so day 33 of my cycle cuz i had a weird feeling it was neg. did another 2 days later same thing. now im day 39. what should i do?