Ok so I was suppose to start my period last Friday the 3rd. Still have yet to start but keep getting negitive tests. My period has never been more than a day late ever without some sort of sign like spotting. My boobs just started hurting today when normally they start a week before my period is due and stop about a day before I start. I haven't done anything different this month than all the rest no more stressed out then normal. Has this ever happened to anyone and they ended up being pregnant?