My period starts so light. Usually my period starts light to heavy as all girls do. But all day it was so light and the 2nd day till the 3rd day. The 3rd day was just a spotting. 3 days after my period I felt something came out to me and it was blood. Spotting again. I feel so tired and cannot sleep easily. I already have a daughter and she's 21months old. I don't know if I'm pregnant. If I'm not , is there something to be concerned with?