Is Coffee, tea, cola, energy drinks, chocolate safe during pregnancy?
In short, according to public-health guidance, coffee, tea, cola, energy drinks, chocolate is best limited during pregnancy.
Why
High caffeine associated with miscarriage/low birth weight
What to do
limit to <200 mg/day (~1 12-oz coffee)
The rest of the guidance
Most people checking one food have two or three more in mind. Here is the whole list, strictest first — each verdict is the same one published on that food's own page.