Tea makes me bloat!

Recently whenever I've had a cup of tea it has made my stomach bloat to the point it's physically uncomfortable. I drink caffeine free tea always and usually only one cup a day. I never had this problem before. It doesn't seem to matter which tea I drink, the result is the same. I haven't changed my diet, I'm well hydrated and I don't have any other health issues. Are my tea drinking days over?

Edit: I do drink it with milk, but I eat and drink dairy products all the time and I never experience any problems then. It's only when I drink tea.