3 dpo Blood clot

Miriam • 24, ttc, happily married, been together for 5 yrs
So i think i ovulated on 8/10 due to a positive opk and cramps today 8/13 which would be 3 dpo i woke up and went to the bathroom and passed a small blood clot which ive never had this before at this time...ive also have been having cramps since ovulation which havent gone away...what do you think? should i be worried does it look like a good sign?