early miscarriage???

Sharita
I'm not due to have my cycle until the 23rd of this month. I am using the nuvaring but I've never bled or anything since I've been on it. I have been on the nuvaring since feb. Tonight as I was bathing I saw something at the bottom of the tub and just was wondering if it could be an early miscarriage before I have taken a pregnancy test. The clot is a little hard if that helps anything and it's a little bigger than a #2 pencil eraser