I really dont know what to think of this..

so my period lasted from 11/16-11/21, normal flow. DH and i dtd on sunday 11/26, I had a pap smear done on Wednesday 11/29. we didn't have sex until 12/1 (today) preseed was used. so we went 4 days this week without having sex. I went to go clean up and this came out of me. should i be worried? It's not red at all..just brown. But it clumped up with im assuming the semen and preseed? period ended less than 2 weeks ago. please help me. sorry if its gross but I'm trying not to let my.stress get the best of me. thank you in advance