There is no reliable over the counter anti anxiety medication.
People often suggest benadryl, but I recommend against this, as this drug has now been associated with the development of Alzheimer's with long term use.
In addition, MOST drugs are not indicated for the long term treatment of anxiety.
SSRI drugs and SNRI drugs are indicated, and they are all prescription.
Cognitive behavioral therapy, with a therapist, has been shown to be as effective as medication in many studies.
Medical contributers to anxiety need to be ruled out or addressed: thyroid
disease, low magnesium, and possibly low B vitamins and vitamin D
I would see an internist to start.
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