i would try one more test just to be on the safe side. supplements can have different effects on every woman. if it's not the supplement making you late any change in stress factors or hormone changes can cause you to be late.
my period is late. i'm safely sexually active. with condoms and even pulling out while also using one. taking biotin. we've been together for over 1 year. i've never been this late before. it's been 15 days already. we have sex but he always uses a condom and he doesn't even ejaculate inside even though he's wearing one. i've been taking biotin supplements and i'm worried or thinking that maybe that might be the reason other than pregnancy. i took a test and it was negative. that's the only other explanation i can think of.