I think I might miscarry?

If you know you're pregnant, you're past the point where any of those herbs would have an effect, especially at low doses. That recipe would be for bringing on a later period, or perhaps trying to prevent implantation when you were just pregnant, before a test would even show positive.

Many of the herbal products that can cause miscarriage take a week or more of use to produce results. I can say for absolute certainty that one instance won't cause any issue, but I doubt you have anything to worry about!

You'll be fine. Those would have to be taken in large quantities to have any effect.