Fiber one bars

I’m 24 weeks pregnant & when I was in the grocery store I saw “fiber one 70 calories” bars & bought them because they looked so yummy... just ate one & googled fiber one bars and apparently you’re not supposed to have them because of some kind of root extract?!!! Apparently it can cause miscarriage... I’ve had 1 miscarriage prior to this pregnancy so I’m FREAKING OUT... anyone have knowledge on this??