I have regular periods(which usually last about 6-7 days)and never had any problem before,but this month me and my husband both were a bit careless and we used pull out method..then my period were delayed by four days which is a bit unusual for me,also, before I used to have mild cramps some days before my periods but this time I had them for about a week and they were very painful and almost felt like my periods were beginning to start but when i checked there was nothing..on the fourth night i had little spotting and next day my periods started..now the problem is there was heavy bleeding two days and now they have almost stopped and there is some light blood..brownish type..and i am also experiencing mood swings,extreme fatigue,my breasts are swollen and well, a little nausea sometimes..i am a bit worried now..i thought initially i couldnt possibly be pregnant if i am having my periods but now this is worrying me..i would really appreciate specific answers to my situation..thanks