Is it possible that after switching from Vibin to Vibin Mini, the body reacts with bleeding occurring during the 21-day period of taking tablets with active ingredients?

Is it possible that after switching from Vibin to Vibin Mini, the body reacts with bleeding occurring during the 21-day period of taking tablets with active ingredients? This situation occurs in me already the fourth month, and I do not have bleeding during the 7-day break. I do not know whether this can still be regarded as a transitional period or whether it is a worrying situation.