Hi Casandra, you found a great place to ask questions about your bunny! I will have to defer to someone else regarding the tummy tea for a young rabbit since I haven’t used it myself before. Have you read the House Rabbit Society information regarding bunny diet? It is especially important to read when you are getting a young bunny. You can find that information here: http://www.rabbit.org/faq/sections/diet.html#babies
There are also somethings you can do to help reduce the stress during the transition. Once you bring your bunny home, allow your bunny to get used to his or her new surroundings. Putting something like a cardboard box with a entrance cut out in the side, or something else your bunny can go into to feel safe will help. Resist the urge to play too much with your bunny right away, and give him or her a little time to relax. Also, I always try to keep my bunnies on a schedule of when I feed them, give them their veggies, and clean their cage. It seems to help them feel more comfortable and it helps me make sure I don’t forget anything!