There are various Natural Herbs for Anxiety While Pregnant. Natural herbs like Chamomile (Matricaria chamomilla), Lemon Balm (Melissa officinalis), Lavender (Lavandula angustifolia), and Passionflower (Passiflora incarnata) are considered safe Remedies to calm Anxiety During Pregnancy.… Natural Herbs for Anxiety While Pregnant: Safe and Effective Remedies