Condom broke but on the combined pill?

Hi everyone, ok so I have a problem that I keep worrying about a lot. Just this afternoon me and my boyfriend was having sex and the condom broke and he said he’d finished but it wasn’t anywhere to be seen. I can’t remeber if I felt it inside me. I’m on the combined pill, Levest. I’ve took it without missing any for a year, abviouslt with 1 week breaks and I haven’t forgot it. I went to a chemist and they said I should be protected and I have nothing to worry about but I am. I don’t know if I should worry, what if my pill doesn’t work? Also I have not been I’ll in the last seven days as I know that can lessen the effectiveness.