Ok help me out please

Laura

Ok I had a period on Jan 1 to the 7 it was a full one. On the 20th Jan I say a light pinkish blood, I thought nothing of it till I looked on the calendar and realized I already had my period.Well now I'm still lightly bleeding(which is not normal I'm normally a heavy bleeder).I'm going on the third day and it looks like it is trying to stop is this normal. I'm also married and do not use protection. I'm not really sure if I'm not pregnant.