WTH is going on! New cycle perhaps?

So as of today, I am 11 days late. I was due on Sept 24th for my period. I have been taking some preg ancy tests since the 24th, with my last test on the 3rd. All came back negative. Today, just a few minutes ago from this post, I had used the bathroom and had some spotty or scanty blood on the toilet paper. I am a little crampy as well, but nothing out of the normal. Could this just be the start of my period coming? I'm going to keep an eye out and see if my period gets heavier throughout the day, but last month my period was just as scanty/light looking (only lasted about a day to 2 if that), so this isn't anything out of the norm I would guess.

Does anyone else feel this could be something else other than my period starting? I just want my period to show or me get a positive hpt so Im not worried thinking there is something wrong with my body! I have an appt with my doctor for the 19th.