PPD Test Positive on clinicals

I started my clinicals that was supposed to last about 6 -8 weeks at a hospital last week and I had to do another TB test. They required another TB test within 90days even though I had one less than a year old. The nurse that read the test comtemplated on the mm of induraion between 8-10mm, but went with the higher number and wrote positive-10mm. Now, I was told I couldn't come back to the hospital to see patients until I go complete a 6-month TB treatment. is that true? what are my options? I have done a chest x-ray and it is negative. I have also had BCG vaccine when I was a little baby. Can I still work at the hospital even with the -ve x-ray but positive ppd while on the medication? Please let me know what u feel. I really need to know my options this week as this will affect my graduation and licensure exam. Thanks