Please need some input

My last period witch ended last week Oct 25th was very lite the first day then it was heavy then the third day very light the fourth day nothing witch wasn't normal at all for me now a week later to day I just went to the bath room and it seamed like I'm spoting again and I'm not a post to get it till the 23 of Dec

Do you guys think I'm prego I'm trying to deside to by a test to night to try to morrow am please help thanks