Cervical Mucus Question - no pictures

So I had ewcm for about 3-4 days (cd13-17) then on CD 21 (yesterday) I had a strange jelly like blob. It was not ewcm, it was a thick blobby, not thin and stretchy like the egg white stuff. It was clear, a little sticky but not like glue or ewcm. I have never hear this before so I am curious what everyone thinks? Through Googling the answers were 1. Sign that ovulation has happened, 2. An early sign of pregnancy/implantation, 3. Some people said it was ewcm, but I know my ewcm and this isn't it.

Anyone else have this?