I'm currently 8dpo. I had the darkest opks of any of my cycles this month and so just for giggles I've been continuing to test to see when they'll go negative. Today I got home from work, peed in my little dixie cup to dip the test in and there was this (sorry if this gets TMI) pea-sized blob of blood/tissue. Wasn't a clot like I've gotten during AF. The only other symptoms I might have are mild fatigue and within the last two days my boobs have felt like they're throbbing or like someone is pinching them. Could this be implantation bleeding or no? TIA!