I am 5 days late on my period with alot of urination and nipple tenderness. what does light yellow, very stretchy cm mean?

Possible pregnancy: If you are sexually active and did not use protection. You should take a pregnancy test. Generally, very stretchy cervical mucus means that you are ovulating, but if you are already late that would probably have happened a couple of weeks ago. Breast/nipple tenderness, mild nausea or weight loss or thirst are all early symptoms of pregnancy as well.