What's going on please help me urgent

Bonnie
I had my period the 1stof this month to the 6th I think... I just got over my fertility week and now I'm having another period again. ... I had unprotected sex right before my first period and I don't eat very well and I drank the last 2 weekends ... is this normal ... my period usually comes a week late I don't understand what's going on ... please help me