Small blood clot/uterine tissue

Hi I’m not sure if anyone has experienced this. After being intimate with my husband last night I cleaned up and saw two very small what seems was uterine lining( it looks similar to when I have my period). I am now 12w4d. I haven’t had any spotting or anything since that moment. I am just worried about my little one. Any insight while I wait from a callback from my doc?