hi, i for the last two months my period has come late and when it comes it is VERY light and on-and-off for 5 days. I have had very tender breasts (more than when on my reg. period), fatigue, lower back pain, nauseated at times, and bloated in my lower abdomen. i have take hoe pregnancy tests but each time it shows negative. i have never been pregnant before so i don't really know what to expect. when my mom was pregnant with my sister she had this kind of "period" happen to her for the first three months. could i be pregnant?