Need advise!!

Mandy
So I ovulated the 21st according to Glow, but on the 27th my cm was the consistency of egg whites and since the 28th I have spotted on and off(brownish pink) and the last two days I have had no spotting what so ever and AF is due today....AF is always on time and I have no signs that she will show. Please if anyone has experiences this your advise would be greatly appreciated!!