Had a misscarriage a few days ago

Is it normal to have numerous amounts of black clots? I took a bath this morning, and all the blood was gone, but Wednesday night I had black dots in my blood, it kept getting thicker and soon I was seeing numerous amounts of black blood, brown, and then really red, along with extreme pain in my uterus, and finally right now I’m experiencing a lot of contractions. I knew I must have been too early to tell but I had 2 positive pregnancy tests, went to the doctor and the blood tests were negative plus the urine samples, but then took another pg test and it was positive. Finally, I went to the er and found out I had a ovarian cyst, went to get ultrasound and they said it ruptured. Has this ever happened to anyone before?