Heavy bleeding after period ended

Catherine

Hey guys!

I am TTIC.Last month was our first month really trying. My period was July 14-21. We tried on my highest ovulation day, July 27 and 28. I started my regular period August 11th and quit bleeding on August 17th. On Wednesday, August 19th, I woke up with severe cramping and heavy, clotty bleeding. What could this be? Miscarriage? I have had one before, but never experienced this much pain. Should I go to the doctor?

Thanks!