ok its possible to get a missed period with out worrying it happens. the yeast infection and the antibiotics your have been on there could be a link to the missed period this would depend on your medical history. next time your on antibiotics try taken yogurt each day your on the should stop the yeast infections if you do get a yeast infection try warm sea salt baths and just let the water get inside your vagina for more info just google sea salt and yeast infection. hope this helps you. good luck
okay i'm gonna give all the details because i'm freaking out and i just need answers. so i lost my virginity to my bf 6 days before i got my period. we've only ever had sex 3 times. after the next time i got my period two days late. my next period was supposed to be december 13 and i haven't gotten it. we always use condoms (never broke). i figured maybe it's late because of all the antibiotics i was on due to strep throat and the abnormal sleep patterns due to finals but i just never got my period. the antibiotics also caused me to get a yeast infection. so why did i miss it!?