Tmi.... period?

Ok. So, I "started" yesterday, but it has been lighter and very dark brown/black stringy stuff. It has only seemed heavy for a few minutes after I went to the bathroom, but other than that, it looks like a really nasty sinus infection. Not sure what the issue so any help would be great. I haven't had any of my typical period symptoms so I'm not really sure. I have had a lot of pregnancy dreams though...