last period I had was very heavy had lots of big clots tissue and fleshy things in it so my dr suspected miscarriage but the pregnancy test was negative on the fifth day of bleeding. the bleeding lasted 10 days. now this period i had brown spotting start three days before it was due and continue seven days until today whem some stringy brown discharge came out. i wiped and there is period but some of the blood looks grey. i'm also fewling dizzy. would this be normal for a period after a miscarriage?? what should i do? i saw the dr for the ten days of bleeding last week after an ultrasound so i feel silly going back. the ultrasound found a small corpus luteal cyst and my endometrium was thick.