I suggest you to see a doctor as soon as possible. I have read several articles about bronchitis treatment and I found some safe and inexpensive ways to treat acute bronchitis from healthguidance.org.
1) Long hot showers.
2) Keep drinking fluids, preferable water.
3) Red clover is known to calm bronchitis.
4) Vitamin C has been shown to decrease the duration and severity of a cold, thus helping reduce your risk of contracting bronchitis.
5) Echinacea can be taken to help boost the body’s immune system and help fight off infection.