What is your pulse rate right now? A pulse rate would be one of the symptoms of too much caffeine, but it should be out of your system by now. Tea has less caffeine than coffee and I've never had effects that stayed with me that long even with expresso! I suspect there was something else in that tea besides tea leaves. Go back to the restaurant and ask to see what kind of tea they use. Another possibility is maybe there was something in the food you ate...an allergy reaction?
Some of the oriental medicinal teas floating around have foxglove mixed in. Foxglove is a dangerous substance. It would acount for your symptoms.
Thank you for the comments. I am feeling better now, 24 hours later. Caffeine levels are elevated the longer the leaves are brewed, so perhaps that contributed. Also, every person's body has some variations, such as medications I may be taking, my weight, etc. I've talked with some doctors since posting earlier, and I guess I will survive. That waitress really did put A LOT of tea leaves in that pot.