Help help

Hiya so I’m on the combined pill and about three weeks ago my other half came back from travelling, I missed my pill about 3 days before he came back and we had sex but I took plan B, the day after we used protection with extra thin conforms because I hate the feeling of them but it split and he did finish. I took a test yesterday which was 3 weeks and 4 days after that incident and it’s negative, Do I need to still worry or am I okay? I have no symptoms of pregnancy I believe but do I wait a week or ignore my overthinking :) thanks xx