No worries.. right?

I have been on birth control for couple years, but back in January I missed two (pharmacy was closed 🤦🏼‍♀️). January 24th we had sex, condom broke. I decided to take a plan B, even though I am on birth control but only because I missed two pills. I have taken (at least 6) tests since then (in Feb, in Mar) and all negative. Should I second guess if my birth control and plan b kept me protected?