Unusual light period ? Or is it a period?

Sorry for tmi! Normally my period is fairly heavy red blood and lasts 5-7 days... this month I started on Friday but have been light the whole time with light brown watery discharge baring one day (Sunday) in which I had a thicker dark red but still light for me... not even enough to fill a tampon. I still have the light brown discharge today. I remember having an unusual period before finding out I was pregnant with my son but I can't remember what made it unusual lol. So this is making me wonder if I could be pregnant... or am I just wishful thinking?