Cm question

My period is due Friday, and I have been having very light cramps since yesterday. I am 10 DPO today and have a pretty regular cycle.

Today I noticed odd cm. It was sticky/stretchy, yellowish, and almost like small clumps. I pay close attention to cm and have never Noticed this before. Any ideas what it could be? I try very hard to not symptom spot but this struck me as odd.