There are herbal remedies to reduce anxiety. However I doubt you will have some on hand unless you specifically found them earlier. I would recommend skullcap, passionflower, St Johns Wort, Tulsi and poppy tinctures which are all nervines. I might when suggest some lemon balm or anise hyssop as well which taste better and can be commands consumed in larger quantities.

If this is something you are interested in learning more about I would recommend Rosemary Gladstar: Beginner Guide book. She’s amazing and has some great simple recipes