The amount of mucus and the effect of birth control pills

Hi, I have been taking vibin tablets for 3 years. On Tuesday I took the first tablet from the new packaging and since then I have no mucus. Previously, it was of different density or quantity but always occurred. Nothing bakes or hurts me. During the previous cycle, I took an additional tablet twice (it turned out that without the need because a disposable loose stool does not affect the tablets). I took an additional tablet on the first week and the last day of the previous cycle, so the bleeding came a day later. Can the lack of mucus mean that the tablets do not work? Is it because there are too many hormones? I did a pregnancy test yesterday and it came out negative.