Hello - I personally am very proud of you for stopping smoking! Your body is going through nicotine withdrawals - hence the anxiety and the body complaints. Your body is detoxing and will continue to do so for a while since nicotine residue stays in the body (and lungs) for a while after stopping smoking.
The following are natural herbs that will help: Garlic, Fennel, Ginger, Hyssop,(all expectorants) Milk Thistle (reverses the effects of nicotine), Burdock (purifies the blood), Elecampane (cleanses the lungs), Fenugreek (dissolves old hardened mucous from the lungs - used for treating tuberculosis), Licorice (soothing expectorant), and Sage (will calm your nerves).