all the herbal suggestions here soound excellent.

osha root along with elecampane will help the body fight the infection. a friend of mine used to grind osha into a powder and make an osha honey to add to infusions and decoctions. good untreated preferably local honey is itself good for fighting respiratory infections; I recently read a study where a teaspoon of honey given to children with colds at bedtime resulted in less coughing and better sleep.

my favorite book on the topic is Breathe FreeL Nutritional and Botanical Medicine fort the Respiratory SYstem, by Daniel Gagnon and Amadea Morningstar. there is an entire chapter on acute bronchitis.
I'm also emphasize carotene-ruch foods for Vitamin A - deep green and deep yellow vegetables especially - and avoid anything known to me more musuc-producing; dairy products, fried foods, most baked goods especialy with white flour, sauces or soups thickened with flour and cornstarch.

I respond really well to echinacea tincture taken thorughout the day for at least four days to help fight infections...get the strongest and freshest product you can find, made from the root and rhizomes.

there are some traditional Chinese blends that are really effctive but I'm not as familiar with CHinese herbs so would advise speaking with a practitioner if that's the route you want to go. acupuncture is the other main branch of classical Chinese medicine and it is really helpful with balancing energy for lingering inmfections and other stubborn problems.
\
hope you feel better soon.

I'm away form home and don;t have the book in front of me. I agree that you want to loosen the mucus and bring it up, rather than surpress the cough. lots of water and warm to hot broth.

the culinary herb thyme (ther are many types) in cooking as well as brewed into a medicinal tea, is wonderful for coughs. Traditional Medicinals started using it as an ephedra substitute in their blends, and I've found it really effective.