In need of serious advice.

I take Blisovi which is a two hormone pill and I take it around the same time everyday, that is around 6:30-7:30. I bled for three days randomly on my very last pack and then had my period for three days. I’m only in my second month of taking BC so I’m on my second pack and on my placebo pills but my Perrier hasn’t come. When I have sex, we use protection, we’ve only not used one one time and he didn’t even finish. Is there something wrong. Should I be worried? Please help