late and panick

i’m late by 12 days and still got no sign for period. i did have sex but with the pull out method and i’ve take a test with pregnancy test but turns out i’m not pregnant. i’m going through so much stresses lately. i don’t know what to do with the stress. i’ve been through a lot family problems, love problems, too much assignments, etc. these past few months i got my period late but only for <5 days and this time got longer than usual. are there still a chance that i get pregnant or it’s obviously just the stress i’ve been having?? help me!! i’m so afraid