Lining check = two tiny dots = wtf?

Two tiny dots.... that aren't fetal sacs.   I wish I had taken a photo.  Had I known I wouldn't be able to find a comparable photo in google images, I would have!!!     My lining thickness was awesome.  11.8mm?  12.2mm?   Whatever it was, it was good (and triple stripe which is good).  I didn't really remember because I was too busy looking at these tiny black dots between my myometrium and endometrium.  Aka, the dots weren't in the endometrium.  They were pretty much between the lining and the uterus itself if that makes sense.  They were black, so they were filled with fluid.  They were tiny, maybe a 1 or 2mm?   The sonographer didn't really say much.  They usually don't.  I get monitored remotely so she is just the grunt.  She said she would include it in the report to Cleveland Clinic (CC).   CC usually calls between 2 and 5.  If they say I am to proceed with the FET, I will at least ask their opinion on the dots.  I google fibroids, I don't think they are those.  I googled polyps, I don't think they are those either.  I am at a loss.  Google has failed me.  Or I have finally met my google search final boss.  Can't find ANYTHING that looks like it.   Please pray God grants me patience while waiting to hear.