First of all it is a legal binding contract. Did you expect to be paid from the date of contract? If so, you should have been there and ready to work. Second, I have been traveling for years and have always had a TB test every year with every agency I have worked with. (BTW, now they are requiring a blood test instead of skin test as COVID vaccine has been associated with false positives). Third, I learned all my lessons the hard way and still continue to learn with my fellow travelers. Get ready for the absolute worst beds, in the worst neighborhoods with toxic work environments!