Should One Get A TB Blood Test For Persistent Cough?

I was out of the country at the end of January for 2 weeks visiting New and Old Delhi, The Seychelles and the Dubai. My partner and I developed horrible colds the 2nd week we were there, and eventually coughs. I had all of the necessary immunizations prior to entering these countries. Although my cold has almost completely disappeared, I still have this tickle of an annoying cough. I have RA, and have my blood checked every 2 months. After seeing my rheumatologist the first part of February, with a clean bill of health, he said that as a precautionary test, he was going to add a TB test to my April routine blood work. He said there was no urgency. So, on that note, should I go in and have the TB test done earlier? My partner and I are pescatarians, exercise regularly, eat almost no processed food, and take daily supplements.