HELP REALLY STRANGE

So here's the deal my period was 22 days late!

I had some faint lines on SO MANY test that could have been evaps but they might have been positives. I went to the doc Tuesday got blood work urine and a ultra sound all negative...

Friday (yesterday) I started bleeding heavily bleeding with a ton of tissue and clots with the worst cramps. The bleeding has slowed down quite a bit now and no clots or tissue.

Could it have been a miscarriage and the doc was mistaken or was it just a super late period. Chemical maybe???

I just wanna know what your thoughts are and if this happen to anyone else.