Could I be fertile/ovulating???

Vicky

I took a clear blue ovulation test yesterday morning and it was negative but shows a faint line, could this mean it’s on it’s way? Also no cervical mucus. But yesterday evening I have stretchy cervical mucus and discharge in underwear as well as when I wipe it looks quite slimy and stretchy. Sorry for TMI haha. Can it change in the same day?!