If I have been taking Vibin since December, is the relationship already secured in May?

Hi, I have been taking Vibin tablets since December while I started them not on the 1st or 3rd-5th day of the cycle. Was the ratio that I had without additional protection on May 28 (that is, on 7 blister tablets) already completely secured by tablets even though I did not start them properly on the first day of menstruation or on the 2-5th day of the cycle?