I think they have to tell you things like that! Don't stress about it! I've know a few people who have had the same thing as well and its usually nothing!
Ooh okay hopefully it's nothing because they told me that can cause early labor and I don't want that . Well they said they were gonna call me when they get the results of it .
I had this in the beginning of my pregnancy! They sent it in and found out it was really nothing! Did you have a uti at all in your pregnancy? Could be left over from that! If they were worried they would tell you! Mine never turned into anything and I'm 32 weeks with a healthy baby boy