I'm just wondering, if you test positive for tb does that automatically mean you have it?

Exposure not disease: A positive TB test indicates past exposure to the bug that causes tb. Whether you have active TB disease or not depends on whether you are symptomatic or have signs of TB disease on chest xray or other appropriate tests based on your symptoms. Those that only have a positive TB test but none of the above have latent tb. Talk to your doctor who can do additional tests to figure out if you have tb.