Switching birth control

So I was on the pill Loryna for almost 6 months and have been taking birth control for 2 years. I recently just switched to the brand Estarylla which is a different dosage. I took the first active pill of Estarylla on 3/16. I had sex on 3/18 which was the last day of my period. My period was from 3/15-3/18. We used protection but the condom broke. He did pull out & im pretty sure nothing got inside me. I was wondering if I was still protected or if I should be worried about being pregnant?