I had a PPD, because I was exposed to someone with tuberculosis...?

and now the site where the skin was tested is slightly raised and red, though it is fairly small and not like the the big red or pinkish welts you see on others. Should I be worried about active or latent turberculosis at his point? I get a PPD done every year as part of my employment requirements and I've never had a reaction like this. I am a litle anxious. They are going to read it tomorrow.