Wait to see what it is between 48 and 72 hrs after getting the test done. If you got the BCG vaccine (some countries outside the US require it), it's likely that you'll get a false positive. Having an illness like HIV affects how the results are read. Nontuberculous mycobacteria can cause a false positive. The point is that many things affect the results of the TB skin test which is why a lot of places just do the QuantiFERON. Worst case scenario, if you do test positive, you'll probably get an X-ray done.

Do you have TB symptoms? Were you exposed to TB? If so, bring that up to the physician you saw. Otherwise, just wait the 48-72 hours for the actual results :)