Hello thanks for your question.
you were using yasmin contraceptive
pill,which is combination of ethiynl estradiol
which is estrogen hormone and drospirenone
which is progesterone
hormone, where as Belara is estrogen only contrceptive pill and contain ethinly estradiol.Acne is side effect of ethiny estradiol,which is present in both type of contrceptive pill.If this side effect doesn,t disappear in first three months of use,you should consult your Doctor for his opinion.Hope i answered your question.For any further clarification your welcome back to health care magic.