I have notice snot like CM (a strand) for about 6 days after ovulation. Could this be an early sign or pregnancy

No. Progesterone production begins in your ovary when you ovulate. This hormone causes cervical mucous to thicken, appear cloudier and be less "stretchy". I suspect this is what you are noticing. Its normal. It doesn't mean you haven't conceived. If your late for menses, check a home pregnancy test.