Does Valerian Root help with panic attacks?

Hi, Kaylie!
masso posted an important link for you to acquaint yourself with valerian. While most side effects are relatively minor it can cause more serious allergic and liver related problems for some people.
You should consider talking with your doctor or a naturopath before using it.
https://www.drugs.com/sfx/valerian-root-side-effects.html
Best regards and I hope you're feeling better quickly.

Valerian is a flowering plant, the root of which is dried and used as an herbal remedy.

Valerian has been used in alternative medicine as a possibly effective aid in treating sleep problems (insomnia).

Other uses not proven with research have included treating anxiety, stress, depression, attention deficit disorder, chronic fatigue syndrome, tremors, epilepsy, menopause symptoms, and other conditions.

It is not certain whether valerian is effective in treating any medical condition. Medicinal use of this product has not been approved by the FDA. Valerian should not be used in place of medication prescribed for you by your doctor.

Valerian is often sold as an herbal supplement. There are no regulated manufacturing standards in place for many herbal compounds and some marketed supplements have been found to be contaminated with toxic metals or other drugs. Herbal/health supplements should be purchased from a reliable source to minimize the risk of contamination.

Valerian may also be used for purposes not listed in this product guide.

Source: https://www.drugs.com/mtm/valerian-root.html