Baby babble

My daughter is 7 months 11/09 and makes a lot of screaming/ screeching sounds. She makes sounds like ahhhh, arooo blows a lot of raspberries and laughs But does not make any vowel sounds such as dada, Ma, gaga, ba She does not mimic/ imitate sounds I make Were your babies the same at that age or should I be worried? Panicking ftm here