The barking and "growling" with a wagging tail does sound like she is talking. Pit Bulls have sassy mouths and will tell you off in several different ways. My favorite is the woo woo woo. Sometimes they throw in a growl, but it's not in an aggressive manner, it's just their special talk. Spend time just watching her so you'll become more familiar with her body language and her different barks and noises and why she does them.