I had sex on May 9 used the plan b the morning after & then had sex again on May 13 & the condom broke so I got plan b again still haven't got period?

Get pregnancy test. Get a pregnancy test done to find out where you are. But better yet, think about getting on a reliable method of birth control so you don't have to worry about this! Sex is supposed to be fun - not worrisome! Good luck. LGromkoMD.
It may tak awhile. to get your period. Plan b interferes with periods .