So my period was 3 days late. My husband has a vasectomy 8 months ago. I took a test to be sure amd it was a negative. In the middle of the night I finally started and its been a normal light period like always I just wear a panty liner or light pad. Today how ever I passed a huge clot, like the size of a dollar coin and ever since I've had really heavy bleeding. Within an hour i had almost overflowed the top half of a light pad. Is it something to really worry about or probably cause i was late.