Missed period

Marie

Looking for some advice- I always get a pretty regular period every month I alway know when to expect it- I am not on any birth control. And this month my period is going on 13 days late I’ve taken a few tests and they’re all negative. I’m usually a very anxious person just don’t really know what to think of it. And all I’m doing is worrying which is making it worse I’m sure. 😩