Cm color and texture

Does the cm thickening if you think your pregnant. It's a stretchy, mucus when I check down there and when it is found in my liner, it's has a slight yellowish tint when time to use restroom and change liner. Also urinating a lot more, full feeling in tummy and irritated at times during day... On day 24 of 28. Period due January 3rd... Am I pregnant?