Well let's see. I'm on pregnancy#4 and ive always drank 1-2 cips a day while pregnant with docs approval. Normally I drink 3-4 cups a day lol And chai teas I've had a few times this pregnancy. My chais were from the coffee stands in town not made at home. Not sure if thay makes a difference at all. In moderation you should be fine. :-) good luck and congrats!
Chai tea I would ask your doctor/midwife about some herbal teas are okay while others are not. Coffee is okay in moderation, decaf is better(blah).