i am having a strange problem with my body.

my last period started on august 22nd, and i have a 28-30 day cycle. my july perion was on the 27th or 26th
over the weekend of sept 6th and 7th i had some menstrul like cramps.
and on the 8th i started spotting. i felt something come out of me and went to the bathroom. i peed but there was no blood in the toilet, when i wiped there was red blood on the paper. i put a panty liner in and then throughout the day there was brownish blood on the liner, and everytime i peep and wiped there would be more brown on the paper. it lasted all monday and contuied into tuesday. when i woke up tuesday i had an awful headach and felt like i was going to vomit. i ate something and took an asprine and was after that.
yesterday, wednesday, it was red again and alot more. but still only spotting in my liner, but alot when i wiped after i peed. there was none in the toilet or in my urine so i know it is not a urinary tract infection.
the blood is a maroon color, not the typical period red i usually get.
today i am still bleeding, but it is more like a period bleeding, on like the first or second day. but this is not how i get my periods at all!
normally i get mild cramps the week before and then the day before get fairly bad ones, then have awful cramps with moderate bleeding the first day of my period.

i did go to my doctor yesterday, but i wont find out the results for a few days, but the waiting is going to be awful. i was hopeing maybe some one would have an idea as my doctor didnt. she did say that she didnt think i was pregnant but aslo didnt rule it out. she said it could be hormonal, but i am only 27!!!
please help.