Stretchy CM

Lindsey • Baby #1 8.20.15 - TTC #2
Today I had some CM make its way out that was very very stretchy, but mostly clear yellow. I could feel it coming out, and it didn't require wiping to discover. I'm only 28 weeks so I don't believe it was my mucus plug, but it was different from my normal watery CM. Any suggestions as to what it might have been?