hi so 3 periods in 6 weeks i would not think so but please do go get a test done at your doctors. this will clear your mind. so if your trying to get pregnant just keep trying. but if your not and your not on bc then its about time you was anytime you have unprotected sex there is always the chance of pregnancy so do go and get sorted out asap but please not depo shot just to many bad side effects. just remember safe sex is the best sex. hope this helps you. good luck
i had my period twice this month and then turned around and had it again 2 weeks later but only 4 days am i pregnant