Question on cervical mucus

This is my second month TTC and I have been testing with the clear blue advanced digital.... last month I got my high flashing smiley at CD 10 and peak at CD 13 the past two which were CD 9 and 10 I receive low! Yesterday I had some clear CM so I was convinced I would at least get flashing high result yesterday but I didn’t... today CD 11 I have got a static peak smiley face and I’ve had clear stringy CM with a little bit of brownish color in it?? Anyone had this before and any idea on CM