Good evening. I'm hoping you can spread some light on information I received today. I was sent to a…

Good evening. I'm hoping you can spread some light on information I received today. I was sent to a specialist in concerns I had an incompetent cervix. My cervix measured 2.5 which he said was fine. My question is he wants to see me every two weeks now because he's concerned about a small blood clot looking debris near my cervix.im 21 weeks and have not bled at all. I had a previous PTL and delivered my son at 17 weeks. I'm wondering why this little blood clot is a concern to him?