Has anybody ever experienced a shorter menstrual cycle than usual and the blood was accompanied by thin watery like CM?

It may be totally normal for some just wondering if there were any different outcomes for others?

Been TTC and my cycle is usually 5 days... this time it was 4 days late, lasted 2 days- day 1 pink spotting, day 2 spotting dark red slimy cm like blood... light intermittent flow that didn’t fill a pad and I usually wear ultra tampons.

Tests have been negative earlier this week. Haven’t tested in a few days.