Don't worry Lew, it doesn't sound like your having too much caffine, a little is ok. But like you experienced at this stage of pregnancy it can raise you heart rate, and cause palpitations. They seem hotter on this in the states than they are here, but the principle is the same. A small amount is fine, 1 cup coffee, or 3 cups tea per day is ok. I'm not sure of the content of iced tea. Anyhow, the reason I say don't worry is cause the risks are mainly in early pregnancy and are to do with development and miscarriage. Right now, you would suffer the effects more than your bubba (who would get a slower metabolised effect) and it would only really cause something similar to what you experienced, like a slightly raised HR. Coral also said something important, it can hinder absorption of certain nutrients too. However, I drink about 5 cups of tea a day, and my midwife said that was fine. x