Plan B late period

Okay, I took a plan b within 24 hours of an oops with sex. My period didn’t when it was expected so when it was 8 days late I took a test. Negative. Now it is 14 days late and I still don’t know what to do. My breasts were sore for two weeks after taking the pill, but other than that I have had no other symptoms. They are starting to become sore again (they always do before I start my period). Should I be really concerned? 😬 (please no hate)