Do I have Bronchitis or just a cold?

I had a really bad cold about a month and a half ago that last two and a half weeks. I felt better for about a week then I got a very weak cold again for another week that is still lingering. I still have a cough, usually around lunch every day after I eat thats been going on a few weeks. I dont have any other symtoms though. Just the yellow crap on my toungue every couple of days that I cough up. I really dont think I have and infection so it should go away, but it just doesn't seem too. Unless I keep getting the cough over again, because I travel around quiet a bit and come into contact with other that are sick all teh time.