Cervix: Low and closed
Notice blood spot near the os and brown clot near the cervix. It could possibly from vigorous intercourse earlier that day (not mittelschmerz as I am not ovulating yet).
*Since posting this last idea that the blood may have been from intercourse, I have been diagnosed with an endometrial polyp that occasionally causes bleeding mid-cycle, usually unrelated to intercourse. I am treating it with holistic measures and hope that it clears up soon.