Is it a chemical pregnancy?

Sarah
So again was supposed to have my cycle October 28th I am always regular. I was spotting but only saw blood when wiped November 1st. November 2nd I had "creamy" blood with a patch of super dark blood on the bottom of the toliet. November 3rd I was soaking a pad through every hour on the hour. It was so heavy I bled through my pants. It was really bright this time. Now November 4th I am still changing pads every hour but there not as soaked but I am still seeing bright blood and dark blood on the bottom of the toliet. November 1st I got a BFP but SUPER faint, same November 2nd and 3rd. Than today it is a BFN. I have abdominal pain. Lower back/hip pain. I have miscarried before but I was 5 1/2 months along, so I just do not know what is going on. Any advice?