It's probably part of your mucus
plug. Some women start losing pieces of it very early
, others never see it come out. The thing about the mucus plug is that it can regenerate itself so as you lose some, it grows back. At this point since it was such a small amount I would say it's nothing to worry about, however if you start experiencing more mucus like discharge, if it becomes red, pink or brown tinged or if you start having contractions, call your ob.