TB takes an incredibly long time to manifest. You would not be having symptoms yet. The chance that you will even get it is slim. TB is spead by droplets. When a person with active TB coughs, they send out tiny little droplets containing the bacteria on them. When you inhale the droplets, that's when you get TB. It actually takes a lot of these little droplets to transmit TB from one person to another, like someone coughing directly in your face with no barriers between the two of you, or repeated contact with someone who has TB. Was it an active TB case? If not, then you have absolutely nothing to worry about. if a TB infection is not active (latent) then it's not communicable. You may have been exposed to the bacteria, but that doesn't mean that you will actually get the disease. If the amount of bacteria is small, your immune system does a really great job of fighting it off. It will settle in one little spot in your lung and your body will make a sort of wall around it so that it can't spread. Be advised, that if this is the case, you may eventually get an active infection if your immune system becomes impared (like if you get HIV or are being treated for cancer with chemo or need a transplant and have to take anti-rejection drugs). You really shouldn't worry too much about this. It's unlikley that you contracted it. You should, however get tested. If you somehow did contract it, you can be started on a 3 to 6 month course of drugs that can stop the infection. I suggest waiting a week or two before getting the test done. It will take at least that long for the antibodies to form. You need antibodies for TB in order for it to show up positive. If you go any earlier, you risk getting a false negative.