I had my first child 8 1/2 months ago and I am 30 yrs old. I breastfed him for 5 months and my periods have been pretty much regular since then. I had my last period on the 25th of last month and yesterday (the 25th of this month), I had a clot, about size of a ping pong ball, come out of me in the shower. I have had no pain, cramps, back pain etc then or since then. Will a test be accurate? Could I have miscarried with no other symptom?